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Growth, sex ratio and age of 188 specimens of Tench, Tinca tinca, from Anzali wetland were recorded during Nov. 2013 to June 2014. The age range of fish was 0⁺ to 6⁺ years. Male to female sex ratio was 1:1.7 that differed significantly (P<0.05). Maximum total length (TL) and weight (W) was 40.7 cm and 1000g, respectively. The b value of the length-weight relationship was 2.70 that showed negative allometric growth (p<0.05). The growth performance index (ϕ) was calculated as 2.61. The estimated von Bertalanffy growth parameters were (L_∞= 47.48 cm, k= 0.18 yr^- and t₀= -1.07 yr). T_maxwas calculated 16.41 years. Also infinity weight (W_∞) was estimated as 1261.43 g. The present investigation provides basic information about population structure of Tench (T. tinca) in Anzali wetland.

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Aims: Understanding the climate of a region can create an architecture that is consistent with it. Therefore, in this paper, the architectural compatibility of the village of Meymand Troglodytic has been identified as the key element of the research. The main purpose of this study is to determine the degree of adaptation of the climate element of temperature to the architecture of Meymand Troglodytic village in the heat period.
Methods: Correlation research method based on field measurements was used. Field measurements were performed on 3 August and 4 August 2019 as representative of the heat period. The temperature variable in the village of Meymand was collected by a data logger and it should be noted that the measurements were made at 6 am and 3 pm to obtain maximum and minimum temperatures.
Findings: The results of the Givoni bioclimatic diagram showed that there was a significant difference between the minimum and maximum temperatures on harvest days. Architectural findings of Meymand Troglodytic village showed that the excavated buildings in the mountain utilize high heat capacity of the soil, which can be most consistent with the climate element in the heat period. Also, the presence of suitable horizontal and frame shades, lack of high openings are other important physical factors in accordance with the climate of Meymand village in terms of temperature.
Conclusion: In conclusion, it can be said that almost all of the buildings in the village of Meymand are associated with the climate element of temperature during the heat period.

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Aims: This study aims to investigate the impact of shading devices and airflow velocity on the thermal (energy) performance and convective flow in a south-facing double-skin façade of a building located in Semnan, a hot and arid region in Iran. The research seeks to determine which type of shading device, including inclined and multi-layer shades, can most effectively reduce indoor temperature and enhance convective flow.

Methods: Numerical simulations were conducted using SolidWorks and COMSOL Multiphysics software for geometry modeling, fluid flow simulation, and heat transfer analysis, respectively. A two-dimensional double-skin façade with various shading configurations was considered, and turbulent natural ventilation flow within them was examined.

Findings: Simulation results demonstrated that the geometry and airflow velocity significantly influenced the velocity and turbulence of the airflow within the double-skin cavity. A geometry with a multi-layer (asymmetric) shading device exhibited an 18.5% temperature reduction at the same wind speed. The maximum temperature reduction occurred in a geometry with a multi-layer (asymmetric) shading device and an airflow velocity of 5 meters per second. In other words, the best thermal performance was observed in multi-layer shading devices.

Conclusion: This research indicated that the use of multi-layer (asymmetric) shading devices can effectively reduce indoor temperature and enhance convective flow. These findings suggest that the appropriate design of shading devices can be employed as a passive method to reduce energy consumption in buildings.