Despite different definitions and interpretations, like meta-language, meta-criticism and metafiction, Meta poetry is essentially applied to a poem that is about poetry itself and the poet consciously focuses on the subject of poetry. Therefore, depending of his views, the poet explains the nature, the characteristics, and the function of poetry.Among the Persian poets, Nezami Ganjavi is one who most frequently returns to Meta poetry and the best example in this regard is his Makhzan al-Asrar. Besides focusing the main subjects of his poem (unity of God, eulogy of the prophet, moral teaching, etc.) he also deals with the subject of writing, especially writing in verse. Indeed he devotes some whole parts to such subject as the origin of his poem, the virtues of writing, and the value of eloquence. In one of his stanzas (stanza 14th with 66 distiches) one can clearly see a variety of issues, from the proper subject and function of poetry to the moral status of poets and its kinship with prophecy, and from criticism of the eulogists to the relation between poetry and magic, etc.If we include comparison in the realm of meta poetry, besides the examples mentioned above, in the 12th stanza of his book Nezami compares Makhzan al-Asrar with Sanai’s Hadiqa al- Haghigha, where, like every other poet who prefers his own poem, he opines that his work is superior to Sanai’s.In this article, the aim is to identify Nezami’s Meta poetry and to discuss the above issues according to the theories of the poet’s age and current literary theories and to explain the conclusion.

This paper concentrates on the presentation of a closed form solution of dam-reservoir interaction considering reservoir viscosity and bottom absorption under harmonic excitations. For this purpose, the governing equations of dam-reservoir are solved in the frequency domain and using the obtained frequency response function, the effects of different parameters are considered on dam or hydrodynamic pressure response. The results show that consideration of reservoir viscosity creates an imaginary term and the responses depend on values of viscosity, bottom absorption, exited period and dam-reservoir period.

The purpose of this study is to evaluate the evaporation and seepage losses in different dams' reservoirs operation policies. In the present study, in order to assess water losses, water supply deficiency and reservoir efficiency indices from 2012 to 2018, first, the operation policy of the Generalized Reduction Gradient (GRG) formulated, then the mentioned indices for the generalized reduction gradient, the current operation and the proposed rule curve estimated and compared. The Seep/w numerical model calibrated using vibrating wire piezometers to accurately estimate the seepage value. The results showed that the GRG improved the annual seepage, evaporation and deficiency indices by 67. 86%, 54. 24% and 67. 68%, respectively. Moreover, the improvement of the reliability, reversibility, vulnerability and flexibility indices were 368. 95%, 110. 26%, 67. 68% and 4750. 40%, respectively. This policy also improved the annual evaporation deficiency indices by 15. 88% and 41. 86% respectively, compared to the current operation policy. The improvement of this policy in terms of reliability, reversibility, vulnerability and flexibility indices obtained 25. 54%, 30. 34%, 41. 86% and 125. 15%, respectively. Interestingly, this policy had an 18. 65% growth in comparison to the current operation policy. Therefore, the GRG optimization policy is optimally effective in improving deficiency, evaporation losses, and reservoir's flexibility indices. This approach is recommended to be used for the assessment of reduction in evaporation and seepage losses and deficiency of water supply and also for the enhancement of reservoir performance for other reservoirs.

Considering basic concepts of preventive preservation and measuring the most important influential indicators in proposing an optimum method for preservation and maintenance of historical and cultural works, this paper tries to present methods for proper preservation of historical-cultural works existing in the repository of Malek National Museum.The effects of environmental conditions including relative humidity, temperature, light, gas pollutants and solid particles in the environment of the Malek National Museum and also the consequences of these factors such as acidity changes in paper works, and the effect of fungi and proper environmental conditions for the development of microorganisms have been experimentally investigated. The aim of conducting these experiments was to compare the extent of each environmental factor in the environment of the repository room of the museum with the standards for environmental conditions in the Malek National Museum and to eventually determine the damaging factors in this museum. To do so, all influential environmental factors such as light, relative humidity, temperature, environmental pollutants, and microorganisms were monitored in a specific time range using instrumental analysis methods.

The Gilarlo reservoir is one of the most important drinking water sources of Guermy city. However, because of undesirable water quality, have odor and taste problems in drinking water. Thus, it is necessary to monitor water quality in order to determine effective factors.Water quality assessment of the watershed showed that 56 and 0.47 tons of nitrates and phosphorus were discharged into the lake during 6 months of year respectively, and the main sources of pollutants were agricultural and domestic wastewater as well as geological factors. For water quality monitoring of the lake, 58 samples from the three vertical and longitudinal zones of the reservoir were collected. Then total and fecal coliform and dissolved oxygen, temperature, nitrites, nitrates, phosphorus, phytoplankton and zooplankton were analyzed. Studies showed that temperature stratification and eutrophycation process have occurred in the lake, and the situation has changed from meso eutrophycation during August to eutrophycation state during October, and this state was fixed during winter.