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RISS 인기검색어
- 검색키워드
- 저자 : Aghasi, Maryam (검색결과 4 건)
- 무료
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ABSOLUTELY PURE REPRESENTATIONS OF QUIVERS
Aghasi, Mansour,Nemati, Hamidreza Korean Mathematical Society 2014 대한수학회지 Vol.51 No.6
In the current paper we study absolutely pure representations of quivers. Then over some nice quivers including linear quivers some sufficient conditions guaranteeing a representation to be absolutely pure is characterized. Furthermore some relations between atness and absolute purity is investigated. Finally it is shown that the absolutely pure covering of representations of linear quivers (including $A^-_{\infty}$, $A^+_{\infty}$ and $A^{\infty}_{\infty}$) by R-modules whenever R is a coherent ring exists.
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ABSOLUTELY PURE REPRESENTATIONS OF QUIVERS
Mansour Aghasi,Hamidreza Nemati 대한수학회 2014 대한수학회지 Vol.51 No.6
In the current paper we study absolutely pure representa- tions of quivers. Then over some nice quivers including linear quivers some sufficient conditions guaranteeing a representation to be absolutely pure is characterized. Furthermore some relations between flatness and absolute purity is investigated. Finally it is shown that the absolutely pure covering of representations of linear quivers (including A-∞, A+∞ and A∞∞) by R-modules whenever R is a coherent ring exists.
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Niloofar Haji Mirza Aghasi 대한공간정보학회 2017 Spatial Information Research Vol.25 No.1
Real and accurate data is necessary for all traffic and road safety management to identify problems and risk factors and for priority control correctly. This study aims to develop and introduce a Geographic Information System (GIS) based method for managing and analyzing urban traffic accident data in Iran, to resolve the current data management problems. To support the better decisionmaking process and application of GIS in managing urban traffic accidents. In Iran, road accident data is being collected by some different authorities, such as traffic police departments, insurance companies, emergency units, forensics, etc. Road traffic accident data usage in Iran is limited to mainly serve statistical purposes, while its commitment in first leadership procedure is limited. Taking into the aims, GIS is accounted as a legitimate instrument to deal with urban accident data, and support the best decision-making process for urban traffic accidents and road safety, not only in Iran but also in many other countries which are facing the similar situation. To carry out the methodology, the city of Tehran, which is the capital and most populous city of Iran, was chosen as a case study area.
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Alizadeh, Ali Mohammad,Roshandel, Gholamreza,Roudbarmohammadi, Shahla,Roudbary, Maryam,Sohanaki, Hamid,Ghiasian, Seyed Amir,Taherkhani, Amir,Semnani, Shahryar,Aghasi, Maryam Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.6
Introduction: Fumonisin B1 (FB1) is a toxic and carcinogenic mycotoxin produced in cereals due to fungal infection. This study was conducted to determine FB1 contamination of rice and corn samples and its relationship with the rate of esophageal cancer (EC) in a high risk area in northeastern Iran. Methods: In total, 66 rice and 66 corn samples were collected from 22 geographical subdivisions of Golestan province of Iran. The levels of FB1 were measured for each subdivision by thin layer and high pressure liquid chromatographies. The mean level of FB1 and the proportions of FB1 contaminated samples were compared between low and high EC-risk areas of the province. Results: The mean of FB1 levels in corn and rice samples were 223.64 and 21.59 ${\mu}g/g$, respectively. FB1 contamination was found in 50% and 40.9% of corn and rice samples, respectively. FB1 level was significantly higher in rice samples obtained from high EC-risk area (43.8 ${\mu}g/g$) than those obtained from low risk area (8.93 ${\mu}g/g$) (p-value=0.01). The proportion of FB1 contaminated rice samples was also significantly greater in high (75%) than low (21.4%) EC-risk areas (p-value=0.02). Conclusion: We found high levels of FB1 contamination in corn and rice samples from Golestan province of Iran, with a significant positive relationship between FB1 contamination in rice and the risk of EC. Therefore, fumonisin contamination in commonly used staple foods, especially rice, may be considered as a potential risk factor for EC in this high risk region.
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