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Nowadays, investigating and researching on energetic polymers in order to increase mechanical, thermodynamic, and detonational properties of them have been highly regarded. One of these energetic polymers is GAP. In this paper, molecular dynamics simulation has been used to compare the properties of GAP and GTP energetic polymers. GTP, in principle is the modified form of GAP, in which functional group of triazolium methyl nitrate has been added instead of azide. The mechanical properties of GAP is a challenging topic in the field of energetic materials. Due to the attributes of the 3 azoliom methyl nitrate ring, the mechanical and thermodynamic properties of GTP are expected to be higher than GAP. The results obtained by molecular dynamics simulation showed that GTP is a stable material and its mechanical properties such as Young, and shear modulus compared to GTP have been decreased 27% and 32% respectively, and bulk modulus, Poisson coefficient, and K/G ratio compared to GTPhave been increased 17%, 42%, and 71% respectively. It was also found that the detonation speed, detonation pressure, and oxygen balance of energetic polymer compared to GAP, have been increased 5%, 14%, and 21% respectively. As a result, usage of GTP will increase as a modified GAP material in applications such as clean and chlorine-free propellants for the solid propellant rockets and also safety systems of automobiles.

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Aim: Continuous physical activity is required after coronary artery bypass graft (CABG) surgery to prevent recurrence of the disease; however, its amount is not suitable in many patients. The present study aimed to investigate the stages of physical activity in patients after CABG using the Trans-Theoretical Model (TTM).
Methods: In this cross-sectional research, 120 cardiac patients participated; they had CABG surgery and referred to Ekbatan Hospital of Hamadan. Sampling was conducted using a purpose-based approach. Data were collected using a researcher-made questionnaire based on the TTM and analyzed using the SPSS18 software. Descriptive statistics and statistical processes of one-way ANOVA, Tukey's post-hoc, and Chi-square tests were also conducted at a significant level of p<0.05.
Findings: The mean age of the participants was 57.87±9.89 years. From the 120 patients under study, 4.2% were in the pre-contemplation phase, 14.2% in the contemplation stage, 58.3% in the preparation stage, 10.8% in the action stage, and 12.5% in the maintenance phase of the physical activity. The results of ANOVA test showed a significant difference between the stages of change in behavior with perceived advantages, perceived disadvantages, perceived self-efficacy, and processes of change (p <0.001).
Conclusion: The results showed that many patients did not have regular physical activity after surgery. This makes clear the need for educational interventions based on theoretical models by health educators.

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Aims: Patients after diagnosis of COVID-19 may have psychological problems. Illness perceptions and social support can play an important role in individuals’ health and the effects of stress. This study aimed to determine the relationship between mental health, perception of illness, and perceived social support in Hospitalized Patients with COVID-19.
Instrument & Methods: The present study is a cross-sectional study that was conducted in 2020. 143 patients with coronavirus who met the inclusion criteria participated in this study. Inclusion criteria are age over 18 years, full consciousness, lack of physical and mental disabilities, diagnosis of coronavirus with the approval of an infectious disease specialist, no history of mental disorders, and the ability to communicate with the researcher. Data collection tools were the 21-item depression, anxiety, and stress scale, Zimet’s multidimensional scale of perceived social support, and the brief illness perception questionnaire. Data were analyzed in SPSS 26 using independent t-test, ANOVA, Spearman correlation coefficient, and multivariate regression.
Findings: The mean score of depression, anxiety, and stress for all participants with coronavirus was 8.12±7.12, 11.74±6.02, and 13.92±6.80, respectively. In total, 30.1% of the participants had high illness perception and 59.4% had high social support levels. The multiple linear regression model showed illness perception and social support were associated with depression, anxiety, and stress. Drug history was associated with depression and anxiety. Oxygen saturation was associated with anxiety and stress (p<0.05).
Conclusion: In general depression, anxiety, and stress in patients with Covid 19 are associated with the perception of illness and social support, which is more strongly associated with social support.

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In the present research, combustion species detection in methane/air flame is carried out based on Flame Emission Spectroscopy (FES). Experimental investigation is performed on a test rig equipped with measurement devices to get the flame emission of a perforated burner which is one of most popular burners used in condensation boilers. Combustion species H2O*, OH*, CH* and C2* are detected from their chemiluminescence The emission of OH* radical was investigated for different equivalence ratios (Φ) and burner powers showing an intensity peak in the range of Φ between 0.77 to 0.85 that corresponds to the maximum heat release rate. Emission of H2O* was also investigated leading to its maximum at Φ=0.82 which shows the most complete combustion equation for different burner powers. The similar experiment showed that OH*/CH* intensity ratio was independent of burner power as is confirmed by previous researchers. One could infer equivalence ratio from the flame emission. Burner surface temperature was also targeted by an infrared thermometer with the purpose of finding the maximum surface temperature of 415 to 420oC which happened at nearly Φ=0.82 for all burner powers. Finding equivalence ratio of the burner by using its natural emission and improving its efficiency by the method of investigating combustion specifications relating to heat release rate is the basis of this work.