Showing 5 results for Kaboli
Volume 8, Issue 3 (Autumn 2018)
Abstract
Ornaments are inseparable elements of Iranian Architecture. They take a visual part in defining the quintessence of forms. Muqarnas, as one of these ornaments, stands on the summit of geometry and form of Iranian architecture. A multi-aspect study on Muqarnas is an important activity that can end to the construction of identifiable forms. The study of color, especially on the juxtaposition of colors in Muqarnas is in the scope of this paper. Color, as a vital element in visual perception, can arrange the taxonomy of forms. In comparison with other elements of form like shape, texture, and material, color is more independent in the way that it is not intertwined with non-visual elements like structure. This ends to a convenient application of color in contemporary forms. The juxtaposition of colors in Muqarnas of Safavid era is enquired in this paper; via this, a good tool for color patterns capable of creating Iranian original forms is provided. The quantitative method in the study and the comparison of frequencies of colors yields a quantitative color index applicable in identifiable forms. The data are collected on the field and two methods are applied for the analysis: visual and computational. The result is extracted on the basis of computer modeling and logical reasoning.
Volume 11, Issue 2 (9-2011)
Abstract
Abstract:
Implementation of 3D panels in buildings is increasing due to the importance of lightening,
optimizing and reduction of fuel consumption. These panels are used as interior, outer, load
bearing and partitioning walls beside the structural frame without considering the frame-panel
interaction. Steel frames act in shear mode and panel frames act in flexure; hence, combining
the two systems will change the structural behavior of each system. So, investigation of the
seismic behavior of combined systems using nonlinear dynamic methods seems to be
mandatory.
In this article, frames with 3, 5 and 10 stories (filled in different bays by panel) were modeled
in ANSYS. These frames were then analyzed under Elcentro, Tabas and Naghan seismic
records. The results illustrated that using panel not only results in more acceptable drifts, but
also it lets the system to have a better seismic behavior and more energy dissipation. For
example, the displacements of the structures in the highest level decrease more than 35% by
using one bay panel for filling steel frames. This amount of filling also leads to more than
100% increase in the area under the base shear-displacement diagram of a steel frame.
Volume 15, Issue 1 (In Press 2025)
Abstract
Aims: Morphogenesis layout of the architectural space is one of the first and longest steps in the work process of architects to accomplish their tasks. It is thus that the designing procedure has taken a lot of time and effort up to now. The purpose of this study was to provide a new model for morphogenesis of architecture documents. It specifically created residential building plans by means of neural networks.
Methods: The computational approach of this model was a Latent Diffusion Model including three neural networks: a noise reduction network (UNET), an external variational auto encoder network (VAE), and a constraint encoder network (Clip). A fine-tuning mechanism was used to train this practical model. The method of conducting this study was based on computer simulation, using Python programming language.
Findings: The researchers used the criteria of Principal component analysis )PCA( and a support vector machine )SVM( while evaluating the findings quantitatively and qualitatively. Reading of samples indicated that the workflow and the proposed model of the research not only significantly improved in generating floor plans, compared to the current methods, but also the project plans, in many cases, were comparable with those of humans.
Conclusion: The researchers used the criteria of PCA and SVM while evaluating the findings quantitatively and qualitatively. The researchers’ samples indicated that the workflow and the proposed model of the study significantly improved in generating floor plans, compared to the current methods. Besides, in many cases, the project plans were comparable with those of humans
Volume 19, Issue 3 (5-2017)
Abstract
In this research Kelussia odoratissima Mozaff. leaf extract was used for the green synthesis of silver nanoparticles (AgNPs). At first we compared antioxidant activity of different extracts of K. odoratissima. Then solution containing silver nitrate was treated with the extract which showed high antioxidant activity. Synthesized AgNPs were evaluated by analyzing the excitation of surface plasmon resonance. TEM analysis was also used for nanoparticle characterization. Antibacterial activity of the solution containing AgNPs was measured by microdilution test. Common food contaminant bacteria such as gram-positive (Staphylococcus aureus, Bacillus cereus, Listeria monocytogenes) and gram-negative (Escherichia coli O157: H7, Salmonella enterica and Pseudomonas aeruginosa)were used for the evaluation. The aqueous extract showed the highest antioxidant activity and the solution was used for the green synthesis of AgNPs. The particle diameters were calculated to be 20-40nm with -17 to -19.9 mV zeta potential. The TEM micrographs showed that the AgNPs are nearly spherical in shape and highly monodispersed. MIC of the AgNPs against gram-positive and gram-negative bacteria was between 0.012-0.025 and 0.006-0.012 mg/ml respectively.
Volume 25, Issue 6 (11-2023)
Abstract
Chemical fertilizers have a devastating impact on soil and the environment when used in seedling production and planting. Conversely, biofertilizers can enhance soil structure and fertility while mitigating the harmful effects of chemical fertilizers on the environment. This study aimed to identify an appropriate biofertilizer for Zygophyllum eurypterum, a species that is particularly amenable to arid area restoration. To this end, we conducted an experiments using six different biofertilizer treatments (Azotobacter chroococcum, Azospirillum lipoferum, Flavobacterium F-40, Bacillus megaterium, Pseudomonas fluorescens, and Rhizophagus irregularis) and fertilizer-free control in a completely randomized design by cultivation of the plants in the seedling bags with 15 replications. This was done in the spring of 2018, in the research farm of Semnan University. Vegetative growth parameters such as root length, fresh and dry weight of roots and shoots, number of leaves, shoot diameter, and total chlorophyll were measured three months after planting. The percentage of root colonization with mycorrhizal fungi was measured at three and six months of age of seedlings. In this context, the maximum length of root (33.40 cm) and shoot (18.20 cm), height (51.30 cm), weight of root (99.94 g) and shoot (473.90 g), number of leaves (58.00), shoot diameter (3.32 mm) and total chlorophyll (74.96) were observed in the treatment by Pseudomonas fluorescens. Symbiotic mycorrhizal fungi was confirmed and it increased root length and plant height. The percentage of root colonization increased over time. Root to shoot ratio was increased by application of Azospirillum lipoferum fertilizer. The results showed that the use of biofertilizers Pseudomonas fluorescens, Azospirillum lipoferum, and Rhizophagus irregularis can be recommended in the production of Zygophyllum eurypterum seedlings.
