Calculation of Natural Frequency of Earth Dams by Means of Analytical Solution

Earth dams are 3-Dimensional, huge and inhomogeneous structures that interact with water and soil. They are the most common type of dams used in the world and developing countries like Iran. Seismic analysis of earth dam is very important in regions which have been subjected with earthquake impaction several times. Calculating the natural frequency of dams is the essential part for its seismic behavior analysis. So it is very important to present an appropriate solution for calculation of natural frequency. Natural frequency of earth dams is usually calculated by means of experimental correlations, shear beam analysis (base on the height of dam and shear wave velocity) and time historical dynamic analysis. The present study concerns a new formulation for natural frequency of earth dams by means of analytical method. In this method, shear wave velocity and height of dam are two parameters which are used for obtaining natural frequency. Geometry of dam body, rigidity of foundation, modulus of elasticity and Poisson\u27s ratio are essential in calculating process. Results from proposed method are compared with case histories, numerical method and other formulations. Comparison shows that there is no significant difference in dams with various heights up to 100m

The relationship between emotional intelligence and addiction potential tendency pre-university students

Background and aims: Unfavorable emotional growth in adults may lead to addiction. This study investigated the relationship between emotional intelligence and students’ potential talent pertaining to addiction. Methods: This study is a descriptive analytical study. All male students of pre-universities in Shahrekord city participated in this study One hundred and twelve participnts were chosen based on the stage cluster sampling. In order to collect data emotional intelligence questionnaire and addictive potential survey (APS) were used. Data were analyzed based on Pearson and regression correlation. Results: The results Showed that there is a negative significant relationship among the emotional intelligence (P<0.05, r=-0.37), emotional save order (P<0.01 r=-0.63, P<0.01 r=-0.60) and emotional usability (P<0.01 r=-0.51, P<0.01 r=-0.49) in students resident in city and in rural area respectively and addiction vulnerability. Emotional intelligence and emotional save order components have the potential to predict the addiction tendency (P<0.01). Conclusion: Lack of emotional intelligence is one of the major factors that affect drug using tendency in students. Therefore, training is necessary for students

Comparison of Pelvic Organ Prolapse Quantification and Simplified Pelvic Organ Prolapse Quantification Systems in Clinical Staging of Iranian Women with Pelvic Organ Prolapse

BACKGROUND፡ Pelvic organ prolapse is a common pelvic disorder among women. A standard staging system is needed to carefully evaluate the extent and severity of the disease, and initiate appropriate treatment. The aim of this study was to compare the two methods of standard and simplified pelvic organ prolapse quantification systems in clinical staging of Iranian women with pelvic organ prolapse.METHODS: This observational cross-sectional study was conducted on all women with complaints of seeing or feeling a vaginal lump or bulge and/or a dragging sensation who were presented to a pelvic floor disorders clinic of Imam Khomeini Hospital in Tehran, Iran, from October 2018 to June 2019. All patients were evaluated in terms of pelvic organ prolapse severity and staging using both instruments. Also, length of time needed to complete the questionnaires were calculated. After data collection, the results of pelvic organ prolapse staging and degree of agreement between two examiners were evaluated.RESULTS: A total of 120 women with mean age of 50.92±13.12 years were evaluated. It was shown that there is an almost perfect agreement (kappa coefficient &gt; 0.8) between standard and simplified pelvic organ prolapse quantification systems in all the 3 compartments. Also, there was almost a twofold increase in the time needed to perform standard pelvic organ prolapse quantification (4.16±1.01 minutes) compared to performing simplified pelvic organ prolapse quantification (2.12±1.14 minutes) (p=0.03).CONCLUSION: According to the results of this study, there is a substantial and almost perfect agreement between standard and simplified pelvic organ prolapse quantification systems in clinical staging of Iranian women with pelvic organ prolapse. It seems that using simplified pelvic organ prolapse quantification system is more applicable in clinical practice for staging of pelvic organ prolapse, with high reliability coefficient.&nbsp

Effectiveness of planned teaching programme on practice of post natal exercises among mothers who have undergone lower segment cesarean section

Background: To assess the effectiveness of planned teaching programme on practice of post natal exercises among mothers who have undergone Lower segment cesarean section (L.S.C.S) in selected hospital at Bangalore.Methods: compare the practice scores of postnatal exercises among LSCS mothers between control group and experimental group.Results: Results shows that in post test the control group had inadequate practice score with a mean of 16.33%, standard deviation of 9.44 and mean percentage of 19.60 % where as in post test the experimental group there was a significant mean practice score gain of 39.84 % and standard deviation of 12.58 and mean percentage 79.67 % with a differences of 60.07 %.Conclusions: Significant difference was found between control and experimental group practice score of mothers in all areas of post natal exercises

Molecular analysis of Shiga toxin-producing Escherichia coli O157:H7 and non-O157 strains isolated from calves

Shiga toxin-producing Escherichia coli (STEC) O157 and non-O157 are food-borne pathogens and contaminants of foods of animal origin. This study was conducted to investigate the presence of virulence and integrase genes in STEC isolates from diarrhoeic calves in Fars Province, Iran. Five hundred and forty diarrheic neonatal calves were randomly selected for sampling. Rectal swabs were collected and cultured for isolation and identification of E. coli following standard methods. The isolates were analysed for the presence of class 1 integrons and bacterial virulence factors using polymerase chain reaction (PCR). Antimicrobial susceptibility testing was performed using the Kirby–Bauer disc diffusion method. Out of 540 diarrhoeic faecal samples, 312 (57.7%) harboured E. coli and 71 (22.7%) of them were identified as STEC: 41(69.5%) carried the stx2 gene, 21 (35.6%) carried the stx1 gene and 3 (5%) carried both. Twenty-six (44%) of the isolates showed the eaegene. Among the STEC isolates examined for susceptibility to eight antimicrobial agents, erythromycin and penicillin (96.8%) resistance were most commonly observed, followed by resistances to ampicillin (71.8%), tetracycline (62.5%) and trimethoprim/sulfamethoxazole (39%). Integrons were detected by PCR in 36% of the STEC tested isolates, 57 (89%) of which showed resistance to at least three antimicrobial agents. Our findings should raise awareness about antibiotic resistance in diarrhoeic calves in Fars Province, Iran. Class 1 integrons facilitate the emergence and dissemination of multidrug-resistance (MDR) among STEC strains recovered from food animals

Prediction of domestic violence according to cognitive emotion regulation and early maladaptive schemas of couples

Background: Domestic violence causes the family institution to turn into a tense, stressful, cold and soulless environment. The current study was handled to the aim of predicting domestic violence according to cognitive emotion regulation (CER) and early maladaptive schemas (EMS) in couples. Methods: The present study was a descriptive correlational Research, which was carried out on couples with domestic violence problems referring to counseling centers in Tehran, 2021. The number of 400 people was selected as samples through convenience sampling among those who were referred to counseling centers. The research tools included the questionnaire of Haj-Yahia violence against women, Garfenski et al.'s cognitive regulation of emotion, and Young's early maladaptive schemas. Data analysis was done using SPSS 21 software, Pearson's correlation coefficient and analysis of regression. Results: The findings revealed that domestic violence has a significant and inverse correlation with CER, and a direct and significant correlation with EMSs (P &lt; 0.001). Domestic violence was predictable based on CER (B = -0.411, P = 0.001) and EMSs (B =0.372, P = 0.001). Conclusion: According to the results, CER and EMSs were able to reduce and increase domestic violence in couples, respectively. It is suggested to pay attention to the CER and EMSs of couples and supply the required teaching in this regard

Factors Affecting the Decline in Childbearing in Iran: A Systematic Review

AbstractIntroduction: The decline in fertility and childbearing tendency in Iran is due tovarious demographic, economic, social, and cultural variables. The present research wasconducted to review studies carried out on factors affecting the decline in childbearing.Methods: This systematic review searched for articles published from 2011 to 2017in all the available Iranian and foreign databases, including SID, Magiran, Irandoc,Medlib, Pubmed, Google Scholar, Science Direct, and Proquest using the followingkeywords, “childbearing”, “fertility”, “fertility decline” and “population decline”. Thesearch ultimately led to the inclusion of 53 studies.Results: The main factors affecting the decline in childbearing discussed in the 53reviewed articles were divided to three general categories: 1. Personal and familyfactors, including aging, older age at marriage, current number of children, theduration of marriage, the mean birth spacing, gender preferences, hopefulness, maritalsatisfaction, and quality of life, 2. Socioeconomic factors, including social support,education, occupation and social participation, especially of females, place of residenceand the effect of social networks, 3. Cultural factors, including modernity, urbanizationand industrialization, attitude change towards the value of children, changes in familyvalues and religion.Conclusions: To intervene in the decline in childbearing and to increase the successrate of the designed plans and strategies, policy-makers and planners should providestrategies to deal with all the three noted groups of factors affecting childbearing

Participation of librarians in online social networks to provide services during the covid-19 pandemic (case study: librarians of tehran public libraries)

Purpose: The present study was conducted with the aim of determining the level of participation of public library librarians in Tehran in online social networks to provide services during the COVID-19 pandemic. Method: This research is applied in terms of purpose and was conducted using a survey method. The research population at the time of the research (July and August 2023) included all the librarians of public libraries in Tehran (152 people) from whom a sample of 109 people was selected according to Morgan’s table, and 105 questionnaires were analyzed in the final analysis. The data collection tool was a researcher-made questionnaire. Data analysis was done at two levels of descriptive and inferential statistics using SPSS (version 26). In order to check the average difference between the main research variables, one-way analysis of variance parametric test was used. Findings: The results showed that the librarians had the greatest knowledge about "Bale" messenger and the lowest knowledge about "SoroushPlus". The level of knowledge of librarians regarding social networking tools and the level of influence of the organization on their knowledge of tools has been lower than the average level. The level of necessity and acceptance of social networking tools is "high" and the level of use of these tools by librarians is "moderate". There was a significant difference between the average opinions of librarians about knowledge and acceptance as well as acceptance and use of these networks, while no significant difference was observed between the average opinions of participants about the two variables of knowledge and use of online social networks. Originality/value: Although according to the results of this research, the level of influence of the organization in the librarians’ knowledge of social networking tools is reported to be lower than average, and the level of influence of the organization in the knowledge of content production tools in these sites is reported to be small, the role of the organization in the librarians’ knowledge cannot be ignored. Therefore, the results of this research, by determining the attitude of the research population towards social networking sites, the extent of acceptance and use of these sites by them and identifying the weaknesses and strengths of public libraries in using social networking sites, can be applied by managers and planners of public libraries in order to provide a suitable platform for using the social networking sites, remove barriers to using them, and improve information service

Embryo and callus induction by different factors in ovary culture of cucumber

Haploid and doubled haploid lines can be obtained in a short time using in vitro methods. In this study, unfertilized ovaries of cucumber were harvested and placed on semi-solid MS media as explants in Petri dishes. The thermal shock pretreatment, cucumber genotypes, hormonal combinations and AgNO3 were evaluated as experimental factors in three consecutive experiments. The results of first experiment revealed that the thermal shock pretreatment had a significant influence on embryo induction, and the highest rate of embryogenesis was produced in presence of thermal shock pretreatment and the NAA+2,4-D+KIN+BAP (0.5+0.7+1+1.8) mg/L hormonal combination. The highest rate of callus induction was recorded in combination of absence thermal shock and the NAA+2,4-D+KIN+BAP (1.5+0.7+1+1.8) mg/L hormonal combination. According to the second experiment results, genotypes and the other hormonal combinations in media culture had highly significant effects on embryo and callus induction. The NBDC6*6/32441 genotype had the highest effects on these traits. A combination of BAP (4 mg/L) and 2,4-D (1.5 mg/L) was found to be optimal for embryogenesis. In third experiment, the highest level of embryogenesis (24.93%) and callus (24.19%) induction were found in the local Iranian cultivar in comparison to NBDC6*6/32441 genotype. Silver nitrate treatment had significant effects on the embryo and callus induction. The highest rate of embryo induction was recorded in presence of silver nitrate; however the absence of AgNO3 had a positive effect on the callus induction. In conclusion, the thermal shock pretreatment, silver nitrate, genotype and hormonal combination factors could play key roles in embryo and callus production, independently and simultaneously

Investigation of students' academic participation in combined learning based on learning management system.

Aim and Purpose – Using new methods and proper and interactive experiences can help improve the quality and attractiveness of education. The present study aimed to investigating the relationship between academic participation of nursing students who use combination education based on learning management system (LMS) and studied their degree of academic participation. This is a descriptive cross-sectional study in which the researcher has studied student participation through a demographic information form and a questionnaire on academic engagement. The purpose of this research was to study the nursing and midwifery faculty of Iran University of Medical Sciences in which 229 undergraduate nursing students were selected from the total of 280 from the second to the sixth semester by the total number and according to entry criteria. Then, data were analyzed by SPSS software version 23 and significance level less than 0.05, descriptive statistics, independent t-test, one way ANOVA, and Scheffe post hoc test and Pearson correlation. Most of the research units were female (52.8%), in the range of 21-29 years old (53.3%), single (90%) and native of Tehran (53.7%). The vast majority had a moderate or lower familiarity with the LMS system (75.5%). The majority did not easily access the LMS system (56.3%). Only 2.2% of the units had high satisfaction and 40.2% had relative satisfaction and 57.6% had low satisfaction from LMS-based combination training. The mean and standard deviation of the educational participation score was 51.16±14.86 and their behavioral subscale scores 69.68±16.48 and the emotional subscale was 49.56±20.53 and the cognitive subscale was 38.25±20.55%. According to the results of the study, most of the research units had low satisfaction with LMS-based combination training, which could increase student satisfaction by using all the capabilities of the learning management system and the more interactive design of the combination training, as the majority of previous studies have shown high satisfaction with combined training. Among the subscales of educational participation that have a positive relationship with academic success and academic achievement, the highest mean score was for subscales of behavioral participation and the lowest for cognitive subscales and this study did not show any relationship between the satisfaction of LMS-based combination education and the student's academic engagement