2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2018
Solar chimneys and thermal storage walls can provide comfortable conditions for occupants. In thi... more Solar chimneys and thermal storage walls can provide comfortable conditions for occupants. In this paper, numerical investigations are conducted of a system which is functional in terms of both natural ventilation and passive heating. The system is applied to a south-facing one-story building located in Shiraz, Iran. Initially, the most effective angle for a diagonal part of the system to maximize ventilation rate for the specific site is specified via computational fluid dynamics (CFD). Then, three designs of the system are introduced and assessed. It is observed that an angle of 45 degrees from horizontal for the diagonal solar collector is the best angle for the system to maximize its performance. Furthermore, the results show that, when the system has three inlets and one outlet, the greatest ventilation rate and thermal efficiency are achieved relative to the other designs considered.
Проведен теоретический анализ процессов формирования литых заготовок при непрерывной разливке ста... more Проведен теоретический анализ процессов формирования литых заготовок при непрерывной разливке стали. На базе проведенного анализа разработана математическая модель для изучения термосиловых процессов, происходящих в кристаллизаторе и зоне вторичного охлаждения машины непрерывного литья заготовок (МНЛЗ). Методом математического моделирования определены параметры теплообмена и затвердевания исследуемых заготовок вдоль ее технологической оси. В качестве переменного параметра при формировании заготовок рассмотрена интенсивность теплоотвода в зоне вторичного охлаждения. Установлено, что математическое моделирование достаточно адекватно воспроизводит процессы формирования реальной непрерывнолитой заготовки, что позволяет рекомендовать предложенную модель для проведения исследований и оптимизации условий теплообмена в зоне вторичного охлаждения МНЛЗ. A theoretical analysis of the formation of castings in the continuous casting of steel. Based on the analysis, a mathematical model has been ...
Methadone maintenance treatment might be commonly associated with lying for several causes or man... more Methadone maintenance treatment might be commonly associated with lying for several causes or manipulating psychiatrists and therapists by a number of patients. Deceptive patients tend to manipulate their psychiatrists for multiple causes. This study aims to improve clinicians’ therapeutic decision-making by identifying the reasons for increasing daily methadone maintenance dosage among deceptive patients. One hundred ninety-six patients undergoing the Methadone Maintenance Treatment (MMT) with no statistically significant difference between the overall Addiction Severity Index (ASI) scores at different doses of methadone (< 60 mg/d and ≥ 60 mg/d) and Ahvaz Reality Distortion Inventory (ARDI) scores > 30, were examined in the current qualitative study with multiple semi-structural interviews about the reasons for increasing daily methadone maintenance dosage. The investigation results revealed that the most common reasons for increasing daily methadone maintenance dosage among...
Voltage control and reactive power play an important role in the operation of the distribution ne... more Voltage control and reactive power play an important role in the operation of the distribution network. Accordingly, conventional methods such as the installation of a capacitor in an optimum location with a proper capacity and optimal transformer tap setting which has an impressive effect on voltage control and reactive power are used. But the study on the simultaneous use of these two methods is limited and it seems necessary to be conducted. These days the presence of Distributed Generation (DG) resources has grown in distribution networks. The presence of distributed generation resources has a great influence on the voltage profile due to the radial structure of the distribution network and the low X/R ratio. Therefore, it is necessary to consider the optimal coordination of the use of switchable capacitors and the setting of transformer taps in the presence of distributed generation resources to improve the voltage profile and reduce losses. This paper examines the simultaneous...
The aim of this study was to determine the adequacy of prenatal care in pregnant women referring ... more The aim of this study was to determine the adequacy of prenatal care in pregnant women referring to health centers in Qom in 2016. The type of applied research and a descriptive-analytical cross-sectional study was that data collection using a questionnaire consisting of four sections of pregnancy care characteristics (time of first care and number of care and calculation of care adequacy), demographic characteristics, midwifery and medical records, and factors preventing the correct receipt of prenatal care. The statistical population was 261 mothers who had referred to health centers in Qom in 2016 for prenatal care and stratified sampling method was used. Information about this study was analyzed using SPSS software. The results showed that 26.1% of pregnant women with insufficient care adequacy, 18.8% with moderate adequacy, 50.2% with adequate care and 5% with excessive adequacy of pregnancy care. Regarding the demographic characteristics of mothers, there was no significant di...
The proportion of resources allocated to research and product development phases play the crucial... more The proportion of resources allocated to research and product development phases play the crucial role in forming the routines of R&D companies. In such company, it is a strategic decision to focus on each of these phases, as it will affect many characteristics of the R&D operation. This model is an effort to combine a R&D strategy framework and system dynamics methodology, based on the interactions of the authors with an Iranian R&D company. A general model of R&D operation with indication of elements of R&D strategy in feedback loops is developed. Assumptions of the model are mostly based on the real world attributes of the aforementioned company. The model is then used to explain past behavior of the company over time, and examine current policies exploited by the firm.
In this study, a chemical photosynthesis desalination cell (CPDC) was investigated for saltwater ... more In this study, a chemical photosynthesis desalination cell (CPDC) was investigated for saltwater desalination. The cell consisted of three main parts: (1) an anodic compartment where the oxidation reaction occurs, releasing electrons, (2) a cathode compartment where the required soluble oxygen is provided by microalgae photosynthesis, and (3) an electrodialysis desalination cell installed between the cathode and anode. In the anode, a novel idea was adopted to shorten the desalination duration and increase the salinity rate using a chemical oxidation reaction in combination with the biocathode. The CPDC contributed to the carbon dioxide biological sequestration (reducing air pollution), produced microalgae biomass as a source of renewable energy and generated electricity. In the investigated CPDC, microalgae were used to supply the required oxygen solution as an electron acceptor. The metal anode-microalgae biocathode battery could provide the required energy for electrodialysis. In addition, some extra electricity was generated with a maximum excess power density of 32.4 W/m3 per volume of the net anodic compartment, 16.2 W/m3 per volume of the net cathodic compartment, and 3.07 W/m2 of membrane surface area. This study confirms the benefits of microalgae as a sustainable biocathode in microbial desalination cells (MDCs) to supply electron acceptors in an environmental-friendly manner. Compared to photosynthetic microbial desalination cells (PMDCs), the CPDC decreased the desalination time by a factor of about 4. Besides, the NaCl removal was about 69% for 12 g/L NaCl concentration in the CPDC, higher than other MDCs. In addition, as a new operational factor, the internal resistance variations were determined by electrochemical impedance spectroscopy in different case studies. The results demonstrated for the first time the possibility of applying a new desalination cell (i.e. CPDC) for water desalination and power generation which only uses a source of chemical reaction and microalgae photosynthesis without the need for an external power source.
Attachment insecurity and alexithymia are assumed as the probable causes of emotional dysregulati... more Attachment insecurity and alexithymia are assumed as the probable causes of emotional dysregulation in patients with Borderline Personality Disorder (BPD). The present study was designed and conducted to examine the mediating role of alexithymia in the relationship between attachment styles and Borderline Personality Symptomatology (BPS). In this crosssectional study, 153 patients with BPD were selected using stratified random sampling among outpatients referring to the psychiatric clinics in three major cities of Iran. Also, they were evaluated through the 20-item Toronto Alexithymia Scale (TAS- 20), Attachment Style Questionnaire (ASQ), and BPD Severity Index (BPDSI). On-way ANOVA and then Scheffé post-hoc analysis revealed that the scores of BPS and TAS-20, together with the scores of preoccupied, fearful, and dismissing styles, were higher in the alexithymia group, whereas the scores of secure style were greater in the non-alexithymia group. Furthermore, the results of hierarchi...
Background During the 2019 coronavirus disease (COVID-19) pandemic, burnout emerges as a critical... more Background During the 2019 coronavirus disease (COVID-19) pandemic, burnout emerges as a critical health problem that might involve workers in many occupations, particularly healthcare personnel. Although burnout syndrome is not necessarily proved to be nosologic, it yields serious physical, mental, and social outcomes. However, it is essential to provide practical strategies and effective instruments for people so that they can adapt to such highly stressful conditions. Objectives The present review was conducted to explore preliminary evidence for nature, treatment, and prevention of burnout among healthcare workers during the COVID-19 pandemic. Methods Related English literatures published from the beginning of January 2020 to the end of September 2020 were searched in PubMed, Web of Science, Scopus, and Google scholar databases. “Burnout,” “COVID-19,” “healthcare workers,” “medical staff,” and “pandemic” constituted the search terms. A narrative technique was implemented for mat...
Background Although numerous studies have supported the role of childhood maltreatment in the eti... more Background Although numerous studies have supported the role of childhood maltreatment in the etiology of psychosis, underlying mechanisms have not been well understood yet. The present study aimed to investigate the mediating role of particular forms of dissociation in the relationship between five major types of childhood abuse and psychotic symptoms among patients with schizophrenia spectrum and other psychotic disorders. Methods In this cross-sectional correlation study, 70 first-episode psychotic patients and 70 chronic psychotic patients were selected by systematic random sampling (with the sampling interval of 3) from among inpatients and outpatients referring to Baharan Psychiatric hospital, Zahedan, Iran, and were matched based on age, gender, and education level. Moreover, 70 age-, gender-, and education level-matched community controls were recruited from hospital staff and their relatives and friends. All of the participants completed a research interview and questionnai...
Metabolic disorders, including obesity, diabetes, and hyperlipidemia, as well as cardiovascular d... more Metabolic disorders, including obesity, diabetes, and hyperlipidemia, as well as cardiovascular diseases (CVD), particularly atherosclerosis, are still leading causes of death worldwide. Plasma levels of low-density lipoprotein (LDL) are currently being considered as a critical risk factor for the diseases mentioned above, especially atherosclerosis. Because of the heterogeneous nature of LDL, many studies have already been conducted on its subclasses, especially small dense LDL (sdLDL). According to available evidence, sdLDL levels can be considered as an ideal alternative to LDL levels for monitoring CVD and early diagnosis of atherosclerosis. Recently, several researchers have focused on factors that are able to decrease sdLDL levels and improve health quality. Therefore, the purpose of this study is to describe the production process of sdLDL particles and review the effects of pharmaceutical and dietary agents as well as lifestyle on sdLDL plasma levels. In brief, their mechani...
Background Treatment-resistance is recognized as a significant dilemma in schizophrenia, which ha... more Background Treatment-resistance is recognized as a significant dilemma in schizophrenia, which has been reported to involve approximately one-third of patients with schizophrenia. Case presentation This case report described a 12-week treatment course for a 39-year-old Persian man with treatment-refractory schizophrenia, who showed a significant improvement in terms of positive, negative, and cognitive symptoms after taking ursodeoxycholic acid 300 mg capsules twice a day. Also, ursodeoxycholic acid was well tolerated, and he did not exhibit any side effects during treatment, based on interview and physical examination. Conclusion Ursodeoxycholic acid augmentation seems to be an effective treatment strategy for patients with treatment-refractory schizophrenia. However, further investigations in this field need to be carried out through randomized controlled trials.
Background Bruxism refers to grind or gnash the opposing rows of upper and lower molar teeth. It ... more Background Bruxism refers to grind or gnash the opposing rows of upper and lower molar teeth. It is important to treat bruxism as a factor that can influence sleep quality, quality of life, and mental status in patients with malignancy. Case presentation A 41-year-old male developed bruxism secondary to cerebral glioblastoma. l-dopa, gabapentin, clonazepam, clonidine, baclofen, buspirone, or propranolol were not effective. Mirtazapine, prescribed for side effects of chemotherapy, was effective for bruxism, which was disappeared within 3 weeks. Conclusions Mirtazapine was effective for treating bruxism as well as chemotherapy complications.
2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2018
Solar chimneys and thermal storage walls can provide comfortable conditions for occupants. In thi... more Solar chimneys and thermal storage walls can provide comfortable conditions for occupants. In this paper, numerical investigations are conducted of a system which is functional in terms of both natural ventilation and passive heating. The system is applied to a south-facing one-story building located in Shiraz, Iran. Initially, the most effective angle for a diagonal part of the system to maximize ventilation rate for the specific site is specified via computational fluid dynamics (CFD). Then, three designs of the system are introduced and assessed. It is observed that an angle of 45 degrees from horizontal for the diagonal solar collector is the best angle for the system to maximize its performance. Furthermore, the results show that, when the system has three inlets and one outlet, the greatest ventilation rate and thermal efficiency are achieved relative to the other designs considered.
Проведен теоретический анализ процессов формирования литых заготовок при непрерывной разливке ста... more Проведен теоретический анализ процессов формирования литых заготовок при непрерывной разливке стали. На базе проведенного анализа разработана математическая модель для изучения термосиловых процессов, происходящих в кристаллизаторе и зоне вторичного охлаждения машины непрерывного литья заготовок (МНЛЗ). Методом математического моделирования определены параметры теплообмена и затвердевания исследуемых заготовок вдоль ее технологической оси. В качестве переменного параметра при формировании заготовок рассмотрена интенсивность теплоотвода в зоне вторичного охлаждения. Установлено, что математическое моделирование достаточно адекватно воспроизводит процессы формирования реальной непрерывнолитой заготовки, что позволяет рекомендовать предложенную модель для проведения исследований и оптимизации условий теплообмена в зоне вторичного охлаждения МНЛЗ. A theoretical analysis of the formation of castings in the continuous casting of steel. Based on the analysis, a mathematical model has been ...
Methadone maintenance treatment might be commonly associated with lying for several causes or man... more Methadone maintenance treatment might be commonly associated with lying for several causes or manipulating psychiatrists and therapists by a number of patients. Deceptive patients tend to manipulate their psychiatrists for multiple causes. This study aims to improve clinicians’ therapeutic decision-making by identifying the reasons for increasing daily methadone maintenance dosage among deceptive patients. One hundred ninety-six patients undergoing the Methadone Maintenance Treatment (MMT) with no statistically significant difference between the overall Addiction Severity Index (ASI) scores at different doses of methadone (< 60 mg/d and ≥ 60 mg/d) and Ahvaz Reality Distortion Inventory (ARDI) scores > 30, were examined in the current qualitative study with multiple semi-structural interviews about the reasons for increasing daily methadone maintenance dosage. The investigation results revealed that the most common reasons for increasing daily methadone maintenance dosage among...
Voltage control and reactive power play an important role in the operation of the distribution ne... more Voltage control and reactive power play an important role in the operation of the distribution network. Accordingly, conventional methods such as the installation of a capacitor in an optimum location with a proper capacity and optimal transformer tap setting which has an impressive effect on voltage control and reactive power are used. But the study on the simultaneous use of these two methods is limited and it seems necessary to be conducted. These days the presence of Distributed Generation (DG) resources has grown in distribution networks. The presence of distributed generation resources has a great influence on the voltage profile due to the radial structure of the distribution network and the low X/R ratio. Therefore, it is necessary to consider the optimal coordination of the use of switchable capacitors and the setting of transformer taps in the presence of distributed generation resources to improve the voltage profile and reduce losses. This paper examines the simultaneous...
The aim of this study was to determine the adequacy of prenatal care in pregnant women referring ... more The aim of this study was to determine the adequacy of prenatal care in pregnant women referring to health centers in Qom in 2016. The type of applied research and a descriptive-analytical cross-sectional study was that data collection using a questionnaire consisting of four sections of pregnancy care characteristics (time of first care and number of care and calculation of care adequacy), demographic characteristics, midwifery and medical records, and factors preventing the correct receipt of prenatal care. The statistical population was 261 mothers who had referred to health centers in Qom in 2016 for prenatal care and stratified sampling method was used. Information about this study was analyzed using SPSS software. The results showed that 26.1% of pregnant women with insufficient care adequacy, 18.8% with moderate adequacy, 50.2% with adequate care and 5% with excessive adequacy of pregnancy care. Regarding the demographic characteristics of mothers, there was no significant di...
The proportion of resources allocated to research and product development phases play the crucial... more The proportion of resources allocated to research and product development phases play the crucial role in forming the routines of R&D companies. In such company, it is a strategic decision to focus on each of these phases, as it will affect many characteristics of the R&D operation. This model is an effort to combine a R&D strategy framework and system dynamics methodology, based on the interactions of the authors with an Iranian R&D company. A general model of R&D operation with indication of elements of R&D strategy in feedback loops is developed. Assumptions of the model are mostly based on the real world attributes of the aforementioned company. The model is then used to explain past behavior of the company over time, and examine current policies exploited by the firm.
In this study, a chemical photosynthesis desalination cell (CPDC) was investigated for saltwater ... more In this study, a chemical photosynthesis desalination cell (CPDC) was investigated for saltwater desalination. The cell consisted of three main parts: (1) an anodic compartment where the oxidation reaction occurs, releasing electrons, (2) a cathode compartment where the required soluble oxygen is provided by microalgae photosynthesis, and (3) an electrodialysis desalination cell installed between the cathode and anode. In the anode, a novel idea was adopted to shorten the desalination duration and increase the salinity rate using a chemical oxidation reaction in combination with the biocathode. The CPDC contributed to the carbon dioxide biological sequestration (reducing air pollution), produced microalgae biomass as a source of renewable energy and generated electricity. In the investigated CPDC, microalgae were used to supply the required oxygen solution as an electron acceptor. The metal anode-microalgae biocathode battery could provide the required energy for electrodialysis. In addition, some extra electricity was generated with a maximum excess power density of 32.4 W/m3 per volume of the net anodic compartment, 16.2 W/m3 per volume of the net cathodic compartment, and 3.07 W/m2 of membrane surface area. This study confirms the benefits of microalgae as a sustainable biocathode in microbial desalination cells (MDCs) to supply electron acceptors in an environmental-friendly manner. Compared to photosynthetic microbial desalination cells (PMDCs), the CPDC decreased the desalination time by a factor of about 4. Besides, the NaCl removal was about 69% for 12 g/L NaCl concentration in the CPDC, higher than other MDCs. In addition, as a new operational factor, the internal resistance variations were determined by electrochemical impedance spectroscopy in different case studies. The results demonstrated for the first time the possibility of applying a new desalination cell (i.e. CPDC) for water desalination and power generation which only uses a source of chemical reaction and microalgae photosynthesis without the need for an external power source.
Attachment insecurity and alexithymia are assumed as the probable causes of emotional dysregulati... more Attachment insecurity and alexithymia are assumed as the probable causes of emotional dysregulation in patients with Borderline Personality Disorder (BPD). The present study was designed and conducted to examine the mediating role of alexithymia in the relationship between attachment styles and Borderline Personality Symptomatology (BPS). In this crosssectional study, 153 patients with BPD were selected using stratified random sampling among outpatients referring to the psychiatric clinics in three major cities of Iran. Also, they were evaluated through the 20-item Toronto Alexithymia Scale (TAS- 20), Attachment Style Questionnaire (ASQ), and BPD Severity Index (BPDSI). On-way ANOVA and then Scheffé post-hoc analysis revealed that the scores of BPS and TAS-20, together with the scores of preoccupied, fearful, and dismissing styles, were higher in the alexithymia group, whereas the scores of secure style were greater in the non-alexithymia group. Furthermore, the results of hierarchi...
Background During the 2019 coronavirus disease (COVID-19) pandemic, burnout emerges as a critical... more Background During the 2019 coronavirus disease (COVID-19) pandemic, burnout emerges as a critical health problem that might involve workers in many occupations, particularly healthcare personnel. Although burnout syndrome is not necessarily proved to be nosologic, it yields serious physical, mental, and social outcomes. However, it is essential to provide practical strategies and effective instruments for people so that they can adapt to such highly stressful conditions. Objectives The present review was conducted to explore preliminary evidence for nature, treatment, and prevention of burnout among healthcare workers during the COVID-19 pandemic. Methods Related English literatures published from the beginning of January 2020 to the end of September 2020 were searched in PubMed, Web of Science, Scopus, and Google scholar databases. “Burnout,” “COVID-19,” “healthcare workers,” “medical staff,” and “pandemic” constituted the search terms. A narrative technique was implemented for mat...
Background Although numerous studies have supported the role of childhood maltreatment in the eti... more Background Although numerous studies have supported the role of childhood maltreatment in the etiology of psychosis, underlying mechanisms have not been well understood yet. The present study aimed to investigate the mediating role of particular forms of dissociation in the relationship between five major types of childhood abuse and psychotic symptoms among patients with schizophrenia spectrum and other psychotic disorders. Methods In this cross-sectional correlation study, 70 first-episode psychotic patients and 70 chronic psychotic patients were selected by systematic random sampling (with the sampling interval of 3) from among inpatients and outpatients referring to Baharan Psychiatric hospital, Zahedan, Iran, and were matched based on age, gender, and education level. Moreover, 70 age-, gender-, and education level-matched community controls were recruited from hospital staff and their relatives and friends. All of the participants completed a research interview and questionnai...
Metabolic disorders, including obesity, diabetes, and hyperlipidemia, as well as cardiovascular d... more Metabolic disorders, including obesity, diabetes, and hyperlipidemia, as well as cardiovascular diseases (CVD), particularly atherosclerosis, are still leading causes of death worldwide. Plasma levels of low-density lipoprotein (LDL) are currently being considered as a critical risk factor for the diseases mentioned above, especially atherosclerosis. Because of the heterogeneous nature of LDL, many studies have already been conducted on its subclasses, especially small dense LDL (sdLDL). According to available evidence, sdLDL levels can be considered as an ideal alternative to LDL levels for monitoring CVD and early diagnosis of atherosclerosis. Recently, several researchers have focused on factors that are able to decrease sdLDL levels and improve health quality. Therefore, the purpose of this study is to describe the production process of sdLDL particles and review the effects of pharmaceutical and dietary agents as well as lifestyle on sdLDL plasma levels. In brief, their mechani...
Background Treatment-resistance is recognized as a significant dilemma in schizophrenia, which ha... more Background Treatment-resistance is recognized as a significant dilemma in schizophrenia, which has been reported to involve approximately one-third of patients with schizophrenia. Case presentation This case report described a 12-week treatment course for a 39-year-old Persian man with treatment-refractory schizophrenia, who showed a significant improvement in terms of positive, negative, and cognitive symptoms after taking ursodeoxycholic acid 300 mg capsules twice a day. Also, ursodeoxycholic acid was well tolerated, and he did not exhibit any side effects during treatment, based on interview and physical examination. Conclusion Ursodeoxycholic acid augmentation seems to be an effective treatment strategy for patients with treatment-refractory schizophrenia. However, further investigations in this field need to be carried out through randomized controlled trials.
Background Bruxism refers to grind or gnash the opposing rows of upper and lower molar teeth. It ... more Background Bruxism refers to grind or gnash the opposing rows of upper and lower molar teeth. It is important to treat bruxism as a factor that can influence sleep quality, quality of life, and mental status in patients with malignancy. Case presentation A 41-year-old male developed bruxism secondary to cerebral glioblastoma. l-dopa, gabapentin, clonazepam, clonidine, baclofen, buspirone, or propranolol were not effective. Mirtazapine, prescribed for side effects of chemotherapy, was effective for bruxism, which was disappeared within 3 weeks. Conclusions Mirtazapine was effective for treating bruxism as well as chemotherapy complications.
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