فهرست مطالب رضا ولی پور

Three-Stage Theory explains development of suicidal ideation and suicidal attempt. According to Three-Stage Theory, high levels of pain and high levels of hopelessness lead to suicidal ideation. Belongingness plays a protective role against suicidal ideation and individual's suicide capacity predicts suicidal attempt. The purpose of this research was to investigate the relationship between pain, hopelessness, belongingness with suicidal ideation and attempt.

In this cross-sectional study, 224 patients hospitalized in psychiatric department of Shahid Yahya Nejad Hospital with suicidal ideation were selected through convenience sampling between March to August 2021. All participants completed suicidal attempt question of Self-Injurious Thoughts and Behaviors Interview, Beck Scale for Suicide Ideation, Scale of Psychache, Beck Hopelessness Scale, Interpersonal Need Questionnaire and Suicidal Capacity Scale-3. Pearson's correlation, t-tests, hierarchical regression, analysis of variance and logistic regression were used to analyze the data and data were analyzed using SPSS software version 27.

There was a significant interactive effect between pain and hopelessness in predicting suicidal ideation (P< 0.01, t = 5.01). Additionally, belongingness and burdensomeness had significant interactive effects in predicting suicidal ideation (P< 0.01, t = 2.16). Pain and hopelessness accounted for 63.6% of the variance of suicidal ideation, while belongingness and burdensomeness explained 49.8% of variance in suicidal ideation. According to logistic regression, psychological pain (P<0.01), suicidal ideation (P<0.01) and suicidal capacity (P<0.01) were significant predictors for suicide attempts.

The first step in suicide prevention programs should be to try to reduce the pain and hopelessness of patients. In the second step, the development of the individual's belongingness should be considered. Finally, attention should be paid to the level of psychological pain and suicidal capacity of people, because suicidal capacity and psychological pain are independent predictors of suicidal ideation.

Due to the increasing growth of population and changes in lifestyle, the pressure on water and soil resources has increased, thus, proper management of these resources has vital importance. This research was conducted with the aim of evaluating and comparing the effects of furrow, surface, and subsurface drip irrigation on water productivity, yield, and yield components of spinach in arid and semi-arid climatic conditions of Ahvaz. For this purpose, an experiment in the form of randomized complete blocks with three treatments of irrigation methods including furrow irrigation (FI), surface drip irrigation (SDI) and subsurface drip irrigation (SSDI) was done in three replications in the research farm of the Faculty of Water and Environmental Engineering, Shahid Chamran University, Ahvaz, in 2021. According to the results, the amount of irrigation water used in the FI treatment was 1066 m3/ha and in the SDI and SSDI it was 787 m3/ha, which showed a decrease of 26.17%. In FI, SDI, and SSDI, the average yield of spinach plant (total fresh weight of leaves and stems) was equal to 23.56, 30.17 and 19.28 g and irrigation water productivity was 0.353, 0.613 and 0.392 kg/m3, respectively. In both yield and irrigation water productivity, the SDI treatment had a significant advantage at 5% level compared to the other two treatments. The effects of irrigation treatment on the characteristics of root length, stem length, total length, number of leaves, number of fresh leaves, leaf chlorophyll content and harvest index were not significant. Generally, considering water productivity as criterion, surface drip irrigation is more suitable than furrow irrigation for spinach cultivation.