Simulation of the Kinetics of Dynamic Recrystallization of Alloy KhN55MBYu-VD During Hot Deformation

Metal Science and Heat Treatment - A facility for physical simulation is used to plot dependences of flow stress on the degree of deformation in the temperature range from 1000 to 1230°C at...     

Polymerization of propylene in liquid monomer using state-of-the-art high-performance titanium-magnesium catalysts

A comparative study of propylene polymerization in liquid monomer is performed under laboratory conditions using the IK-8-21 Ti-Mg catalyst designed at the Boreskov Institute of Catalysis and imported industrial catalysts (conditionally labeled TMC-1, -2, and -3). The activity and stereospecificity of the catalysts are estimated along with properties of the resulting polypropylene (granular composition and physicomechanical characteristics). It is shown that the IK-8-21 catalyst is not inferior to imported counterparts in terms of catalytic properties in the synthesis of polypropylene. The polypropylene powder formed on IK-8-21 is homogeneous and has good morphology. The physicomechanical characteristics of polypropylene synthesized on the domestic IK-8-21 catalyst are similar to those for polypropylene prepared with the imported TMK-1 catalyst.     

Feasibility of Using Titanium Machine Turnings in Powder Metallurgy Processes

JOM - The use of titanium machine turnings has been identified as a possible ultralow-cost method to produce titanium powder. However, very little data are available on the viability of this...     

Absolute Isotherms of Adsorption of Components of Binary Liquid Solutions of Macro- and Microporous Adsorbents

Protection of Metals and Physical Chemistry of Surfaces - The methods of describing absolute adsorption isotherms of binary nonelectrolyte solutions components on macro- and microporous adsorbents...     

State and Properties of a Carbon Sorbent Modified with a Bioactive Substance

Protection of Metals and Physical Chemistry of Surfaces - A method for introducing small amounts of betulin (up to 1 wt %) into a mesoporous carbon material with a preset specific surface area of...     

Functional Composite Adsorbents Based on Metal-Organic Frameworks in a Carbon Matrix Applied for Methane Storage

Protection of Metals and Physical Chemistry of Surfaces - In the present work, a method for producing new shaped composite materials by introducing a metal-organic framework structure Cu-BTC110...     

Spatial Quality Evaluation of Pedestrian Streets

This paper presents an assessment of the spatial quality of a pedestrian street located in downtown Bauru, S~o Paulo State, Brazil, from the application of some urban sustainability indicators. Multi-method was used to evaluate the thermal comfort quality of users, urban accessibility and preservation of architectural heritage. The results show that the sustainability indicators, apart from being effective tools in identifying problems, can assist local managers in decision making, planning and monitoring of pedestrian public space. These indicators contribute to a broad diagnosis of the pedestrian street and also the formulation of programs, projects and municipal policies, aimed at providing a better life quality for pedestrians.     

Passive shading strategies to reduce outdoor insolation and indoor cooling loads by using overhang devices on a building

Solar radiation and insufficient shading on buildings during peak hours might increase outdoor insolation and indoor energy needs for cooling loads. Overhang device systems were designed to block subtropical solar radiation. Passive shading strategies help to decrease outdoor insolation, delaying the transfer of heat to the inside of the building and reducing the energy needs for meeting cooling loads. Eight computational 3D models of a building in Taipei City, one set in a base case scenario and the others in the application of seven overhang device systems, were examined by performing outdoor and indoor simulations. Results show that combined overhang device-single edge and layer (OD-SEL) system had the highest capacity for blocking total solar radiation during peak hours. Effectiveness was most significant on the 18th floor and gradually reduced as it approached the ground level. It was demonstrated that shading projected by OD systems on the outdoor areas of the building can lead to mitigation of the urban heat island (UHI) phenomenon by decreasing the outdoor insolation ratings. Shade gained by use of OD systems on the outdoor areas and the envelope of the building can reduce the insolation ratings on the envelope, delaying the transfer of heat into the building. Gaining shade by using OD-SEL systems on the rooftop, walls and windows was the most effective passive strategy for removing indoor overheating, reducing the need for cooling loads. The savings achieved on cooling loads are representing energy savings for the air conditioning system.