The three-dimensional （3D） reacting flow in a staged supersonic combustor is examined numerically. In order to obtain the optimum stream-wise vortices, a swept ramp injector is chosen as the second-stage wall inject...The three-dimensional （3D） reacting flow in a staged supersonic combustor is examined numerically. In order to obtain the optimum stream-wise vortices, a swept ramp injector is chosen as the second-stage wall injection combined with the first-stage central strut injection. The performance of the two-staged injection is compared with that of a one-staged injection, while the strut is kept installed in both cases. The two-staged injections can make full use of the residual oxygen near the wall and release more heat. The second-stage injection further downstream avoids the strong shock waves in the isolator and results in a rising wall pressure and good burning effects after the wall injection. Therefore, it allows more fuel to be injected into the supersonic combustor without causing thermal choking. Parallel injection from the second-stage swept ramp shows low total pressure loss and the best burning efficiency, compared with the other injection angles.展开更多
OBJECTIVE: To examine the influence of cupping on the quality of life of healthy people who referred to traditional Persian medicine clinics in Tehran.METHODS: All participants were examined by Traditional Persian Med...OBJECTIVE: To examine the influence of cupping on the quality of life of healthy people who referred to traditional Persian medicine clinics in Tehran.METHODS: All participants were examined by Traditional Persian Medicine specialists and their temperaments were determined. The area between the shoulders was cleaned, and cupping was performed with a disposable cupping glass for a few minutes. The questionnaire used in this project was the Persian version of the SF-36 questionnaire which assesses people's understanding of their health status. Before cupping and then one monthafter cupping, all participants were called and the questionnaires were completed again. Finally, all given data was analyzed.RESULTS: From a total of 290 questionnaires completed in the first phase of the project, 112 patients were excluded. Ultimately, the data of 178 participants was analyzed. After one month, the quality of life score of 155 participants(88%) increased, remained unchanged for 21 participants(11.7%), and decreased for 2 participants(1.1%). Asked about possible complications from cupping, 160 participants reported no side effects(89.9%).CONCLUSION: Our findings suggest that cupping therapy can improve the scores of quality of life in the participants in Tehran.展开更多
Electromagnetic levitation of electrically conductive droplets by alternating magnetic fields is Sa technique used to measure the physical properties of liquid metallic alloys such as surface tension,viscosity,heat ca...Electromagnetic levitation of electrically conductive droplets by alternating magnetic fields is Sa technique used to measure the physical properties of liquid metallic alloys such as surface tension,viscosity,heat capacity.Experiments can be conducted in microgravity,to reduce electromagnetic stirring and shaping of the droplet.The inductor of the EML is composed of a single inductor which two types of voltage are imposed.This type of electrical installation generates a field to center the metallic droplet and another field to heat and excite it.We use a commercial code join to a homemade code to compute flows generated by inducting voltages recorded in the sounding rocket TEXUS-EML-2(Feb2008).In this flight,two samples(Cu75Co25 at%and A168,5Ni31,5 at%)of 8 mm diameter have been processed.展开更多
Nutrition is one of the most important principles in Persian medicine,and Persian scholars have written various books and treatises on this subject.Atamat al-Marza by Hakim Roshan Zamir is one of these books.Hakim Ros...Nutrition is one of the most important principles in Persian medicine,and Persian scholars have written various books and treatises on this subject.Atamat al-Marza by Hakim Roshan Zamir is one of these books.Hakim Roshan Zamir was a wise Persian scholar who lived in 12th-13th centuries AH(18th-19th centuries AD).He described the details of food-based treatment carefully in his book,Atamat al-Marza.This article tries to introduce this book and the role of foods in Persian medicine and represent recommendations and viewpoints of Hakim Roshan Zamir in this field.展开更多
Ethics in any industry and profession,especially in medicine,is a matter of great concern and debatable.Ancient Persian Muslim doctors also did not neglect this issue,as they mentioned some points regarding the observ...Ethics in any industry and profession,especially in medicine,is a matter of great concern and debatable.Ancient Persian Muslim doctors also did not neglect this issue,as they mentioned some points regarding the observance of medical ethics in most of their books.Rhazes'"Akhlaq al-Tabib"treatise is one of the most important manuscripts on medical ethics.Abu Bakr Muhammad ibn Zakariyya Razi,known in the west as Rhazes,was a great Persian scientist and physician who lived in the 9th and 10th centuries AD.In the"Akhlaq al-Tabib"treatise,he wrote a collection of his guidelines and ideas about medical ethics.In this manuscript,Rhazes first mentioned the ethical qualities that the physician must admire,and then pointed out the ethical standards regarding treatment and patient's rights.The study found that the principles of tenth-century medical ethics are very similar to what is being said today.展开更多
基金National Natural Science Foundation of China(50306011)the German Research Foundation (DFG) (GRK1095/1)
文摘The three-dimensional （3D） reacting flow in a staged supersonic combustor is examined numerically. In order to obtain the optimum stream-wise vortices, a swept ramp injector is chosen as the second-stage wall injection combined with the first-stage central strut injection. The performance of the two-staged injection is compared with that of a one-staged injection, while the strut is kept installed in both cases. The two-staged injections can make full use of the residual oxygen near the wall and release more heat. The second-stage injection further downstream avoids the strong shock waves in the isolator and results in a rising wall pressure and good burning effects after the wall injection. Therefore, it allows more fuel to be injected into the supersonic combustor without causing thermal choking. Parallel injection from the second-stage swept ramp shows low total pressure loss and the best burning efficiency, compared with the other injection angles.
文摘OBJECTIVE: To examine the influence of cupping on the quality of life of healthy people who referred to traditional Persian medicine clinics in Tehran.METHODS: All participants were examined by Traditional Persian Medicine specialists and their temperaments were determined. The area between the shoulders was cleaned, and cupping was performed with a disposable cupping glass for a few minutes. The questionnaire used in this project was the Persian version of the SF-36 questionnaire which assesses people's understanding of their health status. Before cupping and then one monthafter cupping, all participants were called and the questionnaires were completed again. Finally, all given data was analyzed.RESULTS: From a total of 290 questionnaires completed in the first phase of the project, 112 patients were excluded. Ultimately, the data of 178 participants was analyzed. After one month, the quality of life score of 155 participants(88%) increased, remained unchanged for 21 participants(11.7%), and decreased for 2 participants(1.1%). Asked about possible complications from cupping, 160 participants reported no side effects(89.9%).CONCLUSION: Our findings suggest that cupping therapy can improve the scores of quality of life in the participants in Tehran.
基金Item Sponsored by ESA (contract no.:MAP AO 099 022) EC under PI-IMPRESS (contract no.:NMP3-CT-2004-500635) CNES under Material Sciences Program
文摘Electromagnetic levitation of electrically conductive droplets by alternating magnetic fields is Sa technique used to measure the physical properties of liquid metallic alloys such as surface tension,viscosity,heat capacity.Experiments can be conducted in microgravity,to reduce electromagnetic stirring and shaping of the droplet.The inductor of the EML is composed of a single inductor which two types of voltage are imposed.This type of electrical installation generates a field to center the metallic droplet and another field to heat and excite it.We use a commercial code join to a homemade code to compute flows generated by inducting voltages recorded in the sounding rocket TEXUS-EML-2(Feb2008).In this flight,two samples(Cu75Co25 at%and A168,5Ni31,5 at%)of 8 mm diameter have been processed.
文摘Nutrition is one of the most important principles in Persian medicine,and Persian scholars have written various books and treatises on this subject.Atamat al-Marza by Hakim Roshan Zamir is one of these books.Hakim Roshan Zamir was a wise Persian scholar who lived in 12th-13th centuries AH(18th-19th centuries AD).He described the details of food-based treatment carefully in his book,Atamat al-Marza.This article tries to introduce this book and the role of foods in Persian medicine and represent recommendations and viewpoints of Hakim Roshan Zamir in this field.
文摘Ethics in any industry and profession,especially in medicine,is a matter of great concern and debatable.Ancient Persian Muslim doctors also did not neglect this issue,as they mentioned some points regarding the observance of medical ethics in most of their books.Rhazes'"Akhlaq al-Tabib"treatise is one of the most important manuscripts on medical ethics.Abu Bakr Muhammad ibn Zakariyya Razi,known in the west as Rhazes,was a great Persian scientist and physician who lived in the 9th and 10th centuries AD.In the"Akhlaq al-Tabib"treatise,he wrote a collection of his guidelines and ideas about medical ethics.In this manuscript,Rhazes first mentioned the ethical qualities that the physician must admire,and then pointed out the ethical standards regarding treatment and patient's rights.The study found that the principles of tenth-century medical ethics are very similar to what is being said today.
