Customizable Phased Array Antenna Using Reconfigurable Antenna Elements

A shared-aperture reconfigurable slot-ring antenna array switching between different frequency bands and polarizations is presented for phased array applications. PIN diode switches are incorporated into the slots of the antenna to change the state of the reconfigurable slot-ring antenna array. Each frequency band has its own feeding lines which allows for the use of high-performance narrow-band transmit/receive (T/R) modules instead of ultra wideband (UWB) T/R modules. Furthermore, the spacing between the elements in each frequency band is less than half free-space wavelength (λ0) over the frequency band of operation which enables grating-lobe-free beam scanning. This is the first shared-aperture reconfigurable dual-polarized antenna with separate feeding for each band which is scalable to a larger array with element spacing of less than 0.5λ0 in all frequency bands of operation. First, a switchable-band reconfigurable antenna array switching between L and C bands is presented. This antenna operates at 1.76/5.71 GHz with a fractional bandwidth (FBW) of 8.6%/11.5%, realized gain of 0.1/4.2 dBi and radiation efficiency of 66.6%/80.7% in the L-/C- band operating states, respectively. Second, a wideband version of the reconfigurable antenna element using fractal geometries is presented. This dual-polarized antenna element is switching between S and C bands with wide bandwidth in each operating state. In the S-/C-band operating state, this antenna shows 69.1%/58.3% FBW with a maximum realized gain of 2.4/3.1 dBi. Third, the wideband antenna element is extended to an antenna array. The reconfigurable dual-polarized antenna array with vertical coaxial feeding switches between S- and C-band states with full-band coverage. A 2×2 S-band antenna array can be reconfigured to a 4×4 C-band antenna array by activating/deactivating PIN diode switches. This antenna array shows 64.3%/66.7% FBW with 8.4/14.3 dBi maximum realized gain in the S-/C-band operating states, respectively. Finally, a reconfigurable antenna element covering three adjacent frequency bands is presented. The FBW of this tri-band antenna element is 75%/63%/26% in the S/C/X band state

The effect of Neuro-Linguistic Programming and Cognitive Behavioral Therapy on attention and aggression in high school students in Kerman city

Background: One of today's social problems is behavioral abnormalities and aggression and ways to deal with it. The purpose of this research was to examine the effect of neuro-linguistic programming (NLP) and cognitive behavioral therapy on the attention and aggression of high school students in Kerman. Methods: With a control group, this semi-experimental study administered tests before and after the intervention. All 45 male and female students enrolled at Kerman's second-year secondary school were included in the statistical population. Fifteen of them were allocated at random to one of three groups: control, experimental group 1, or group 2. The first group had 18 45-minute NLP sessions, whereas the second group received 6 60-minute CBT sessions. None of the interventions were given to the control group. The data was collected using the DASS-21 scale. Results: Compared to the control group, the educational groups that focused on cognitive-behavioral approaches and natural language processing had lower average indices of mental health evaluation. Students' anxiety and stress levels were significantly reduced after receiving instruction in both techniques, according to multivariate variance analysis. Comparing the three groups' matched results from the follow-up test, there was no difference in statistical significance in anxiety reduction between the two methods; however, there was a significant difference in lowering stress and depression, with the NLP method showing greater efficacy. Conclusion: cognitive-behavioral training is an effective method in increasing the mental health of students and this intervention can be used to improve academic performance in clinics and school health

A study on the role and importance of information technology in the establishment of knowledge management in training and education

The main purpose of this article is to recognize the role and importance of Information Technology in the establishment of knowledge management in training and education. Rapid changes in today's world have posed various challenges for organizations. However, successful organizations are those that take advantage of resulted opportunities by using knowledge management and new technologies. For the success of an organization, knowledge should be exchanged between individuals and be able to grow as an asset. The supporting role of information technology is what facilitates the process of knowledge management in organizations which use it for overcoming problems, anytime and anywhere. In this paper, we assess the role and importance of Information Technology in the establishment of knowledge management in training and education by using descriptive methods, documentation, and review of the results obtained from other studies and articles in electronic research databases and library resources. This article is derived from the Corresponding Author’s MA thesis in the field of educational administration

A study on the role and importance of information technology in the establishment of knowledge management in training and education

The main purpose of this article is to recognize the role and importance of Information Technology in the establishment of knowledge management in training and education. Rapid changes in today's world have posed various challenges for organizations. However, successful organizations are those that take advantage of resulted opportunities by using knowledge management and new technologies. For the success of an organization, knowledge should be exchanged between individuals and be able to grow as an asset. The supporting role of information technology is what facilitates the process of knowledge management in organizations which use it for overcoming problems, anytime and anywhere. In this paper, we assess the role and importance of Information Technology in the establishment of knowledge management in training and education by using descriptive methods, documentation, and review of the results obtained from other studies and articles in electronic research databases and library resources. This article is derived from the Corresponding Author’s MA thesis in the field of educational administration

A study on the role and importance of information technology in the establishment of knowledge management in training and education

The main purpose of this article is to recognize the role and importance of Information Technology in the establishment of knowledge management in training and education. Rapid changes in today's world have posed various challenges for organizations. However, successful organizations are those that take advantage of resulted opportunities by using knowledge management and new technologies. For the success of an organization, knowledge should be exchanged between individuals and be able to grow as an asset. The supporting role of information technology is what facilitates the process of knowledge management in organizations which use it for overcoming problems, anytime and anywhere. In this paper, we assess the role and importance of Information Technology in the establishment of knowledge management in training and education by using descriptive methods, documentation, and review of the results obtained from other studies and articles in electronic research databases and library resources. This article is derived from the Corresponding Author’s MA thesis in the field of educational administration

The Effectiveness of Positive Psychology Intervention on Happiness and Positive Thinking in Chronically Mentally Ill People

The aim of the current study was to determine the effectiveness of positive psychology intervention on happiness and positive thinking among chronically mentally ill people in Mehrana Boarding Center in Zahedan. The research method was applied in terms of objective and data collection method as semi-experimental type with a pre-test-post-test design with a control group. The statistical population includes all female chronically mentally ill patients of Mehrana boarding center in Zahedan city in 2020-2021, of which 30 subjects (15 subjects in the experimental group and 15 subjects in the group waiting for treatment) were selected according to the available sampling method. Instruments used in the study included the Oxford Happiness Questionnaire (OHI) and the Positive Thinking Scale (PT). The positive psychology intervention was delivered in 8 sessions (1.5 hours) over 3 weeks for the experimental group. Descriptive statistics (mean and standard deviation) and inferential statistics (multivariate covariate analysis) were used to analyze the data. Data analysis was performed using SPSS-21 software. The results of the study showed that the intervention of positive psychology increased the feeling of happiness and positive thinking in chronically mentally ill patients in the experimental group compared to the control group with a significance level of 0.001. Therefore, paying attention to the importance of positive psychology intervention on happiness and positive thinking in chronically mentally ill is considered as one of the necessities of research and it is possible to use positive psychology intervention as a part of empowerment programs for chronically mentally ill and hold a course in this field is recommended

The effect of positive psychotherapy in test anxiety among Zahedan students with hemophilia

Hemophilia is a chronic disease which due to several reasons, including frequent absences from school and reduced motivation, leads to the incident of test anxiety among patients. This study was conducted with the aim of evaluating the effectiveness of positive psychotherapy in test anxiety among students with hemophilia. The current study followed a pretest, posttest, and two-month followup quasi-experimental design with an experimental group and a control group. This study had a statistical population including all senior elementary and junior high school students with hemophilia who had medical records in Zahedan Hemophilia Society. After screening them, 60 students were selected and randomly assigned to two 30-person groups of experimental and control. Since some patients refused to continue taking part in this study, the sample decreased to 57 people. Measurement tool used in this study was Sarason Test Anxiety Scale. Positive psychotherapy was held in 8 sessions (two 120-minute sessions per week) and a follow-up was conducted two months after completing the psychotherapy. Data were analyzed using a repeated measure analysis of variance. Results showed that positive psychotherapy significantly reduced test anxiety among the students with hemophilia. Moreover, the stability of the effects of this therapy in the follow-up was confirmed. The obtained results indicated that policymakers should pay a lot of attention to this new positive psychological training and its effects on reducing test anxiety

The maternal and neonatal outcomes of pregnant women with definite COVID-19

Background: This study aimed to assess the symptoms and clinical laboratory data of pregnant women with COVID-19 in their second or third trimester of pregnancy as well as their maternal and neonatal outcomes. Methods: This retrospective observational study was conducted on 177 pregnant women with COVID-19 who were admitted to Yas hospital (affiliated with Tehran University of Medical Sciences), and Ali-ibn-Abi-Talib hospital (affiliated with Zahedan University of Medical Sciences). Results: There was significant higher complaints including fever (p-value=0.015), cough (p-value=0.028), fatigue (p-value=0.002), dyspnea (p-value=0.022), and lower hemoglobin level (p-value=0.009) in patients who were in their third trimester compared to those who were in their second trimester. 9.6% (n=17) of the patients had severe disease and needed ICU admission. There was a significant variation regarding gestational age (p-value=0.022) in pregnant women admitted to ICU compared to the other ones. During the study, delivery happened in 108 (61%) pregnant women. Fetal distress following meconium deification (p-value=0.041), need to MGSO4 (p-value=0.001), IUFD (p-value=0.006), need for blood transfusion (p-value=0.004), and neonatal death (p-value<0.001) were significantly higher in patients who needed ICU admission. Conclusion: Higher gestational weeks are the main risk factor for severe COVID-19 disease. Although vertical transmission is rare; due to the higher risk of perinatal outcomes, the delivery should be done in a center with a NICU department

Induced third-degree burn in rat: healing by Melilotus officinalis extract as medicinal plant

Introduction: burn wounds are common happenings which cause many people have irreversible defects and to be death around the world every year.  In this study, we evaluated the effects of Melilotus officinalis and Alpha ointment in the healing of burn wounds and compare their findings with silver sulfadiazine (SSD).Methods: Seventy-five male Sprague-Dawley rats were randomly divided into five groups, and similar burn ulcers were produced on the back of rats. The first group of rats received no treatment, base gel was used topically to group II, in groups III-V, Alpha, SSD and Melilotus officinalis preparations were applied, respectively. Wound healing, contraction and histopathological examination were evaluated at the end of 7, 14, and 21 days.Results: Alpha ointment was equally effective as Melilotus officinalis gel, while its efficacy was better compared to SSD for all parameters of wound healing on days 7, 14 and 21. Alpha and Melilotus officinalis preparations as less expensive medications which significantly improve the quality of wound healing and scar formation and also are more appropriate treatment choices than SSD.Conclusion: Alpha and Melilotus officinalis are recommended as alternative to SSD, especially in patients with low economical backgrounds or in those who show adverse reactions to SSD.</p

Search for top squark pair production in pp collisions at root s=13 TeV using single lepton events

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