检索结果-内蒙古大学图书馆

Social valuation of protected cultural assets: the railway heritage between Jundiai and Campinas (Brazil)

INTERNATIONAL JOURNAL OF HERITAGE STUDIES 2022年第6期28卷 714-732页

作者： de Oliveira, Eduardo Romero Silva, M. M. de Deus, Julia Santana Junior, Evandro Costa, Amanda Lara, Ana Patricia Santos, Brenda Berata, Thais Bueno, Victoria Sao Paulo State Univ UNESP Sch Sci & Languages Assis Brazil Univ Campinas UNICAMP Inst Geosci Doctoral Program Geog Campinas Brazil Sao Paulo Univ USP Sch Commun & Arts Master Program Tourism Sao Paulo Brazil Sao Paulo Univ USP Sch Educ Dept Pedag Sao Paulo Brazil Sao Paulo State Univ UNESP Dept Tourism Campus Rosana Sao Paulo Brazil Pontifical Catholic Univ Campinas PUCCamp Master Program Architecture & Urbanism Campinas Brazil

Given the shortcomings of traditional heritage preservation practices in understanding the values that justify heritage protection, it is necessary to critically re-evaluate these practices adopted to physically protect the cultural asset, which rarely include the local values ascribed by the surrounding communities. This reflection motivated the development of this study that aims to examine the social valuation ascribed to protected railway assets on the route Jundiai-Campinas (Brazil), in order to compare the different identified values and reflect on the integrated actions of railway heritage preservation and management. To this end, a values-based approach (VBA) was used, a methodology employed for and centred on heritage preservation, which focuses on understanding the local community as one of the protagonists in the heritage valuation process. Applying the different techniques of the VBA method revealed that other values, besides the traditional ones dominant in the specialised dissemination of the subject, also have an impact on the heritage asset. By integrating these community values to the protection and management practices of the cultural asset, it is indeed possible to significantly protect and safeguard not only the monumental object but also its values.

关键词： Values-based approach heritage preservation community valuation

来源：评论

学校读者我要写书评

暂无评论

Size-resolved particulate matter filtration efficiency of macroporous asymmetric SiC ceramic filters

引用

CERAMICS INTERNATIONAL 2024年第1期50卷 2501-2505页

作者： Innocentini, Murilo Daniel de Mello Kayal, Nijhuma Dey, Atanu Chakrabarti, Omprakash Tronville, Paolo Univ Ribeirao Preto Postgrad Program Environm Technol BR-14096900 Ribeirao Preto SP Brazil Cent Glass & Ceram Res Inst CSIR Kolkata 700032 W Bengal India Politecn Torino DOE I-10129 Turin Italy Univ Bath Ctr Regenerat Design & Engn Net Posit World RENEW Dept Architecture & Civil Engn Bath England Cent Pollut Control Board Urban Pollut Control Div 2 Delhi 110032 India Flat 2A 208 Shanti Pally Kolkata 700107 India

Controlling particulate matter (PM) emissions to the atmosphere in industrial processes is critical for a safe and healthy environment. Because of its high strength and thermal stability, silicon carbide (SiC) is among the best materials for producing hot gas filters to be coupled to sugarcane bagasse-fired boilers in Brazil and India. In this study, we evaluated the performance of asymmetric SiC-based filters of different features for removing fine PM with particle sizes ranging from 90 to 3000 nm. The collection efficiency of the asymmetric filter made of SiC/ mullite support with no pore former, porosity of 31-33 %, and permeability of (0.17-0.30) x 10-11 m2 with a coating thickness of 109-138 mu m, effective pore size of 19-26 mu m, and effective collector diameter of 64-86 mu m was higher than 99 % for PM with size greater than 0.60 mu m. The SiC formulation with mullite and pore former also presented promising performance. The resulting pressure drop remained within the range reported for commercial hot gas filters. Over 99 % of the mass of soot and fly ash particles generated during sugarcane bagasse combustion exceeds the MPPS range found for filters, which was between 0.16 and 0.36 mu m. Therefore, the SiC asymmetric filters presenting mullite in their formulation are anticipated to meet current international emission standards.

关键词： Aerosol filtration SiC filter Hot gas filter Grade efficiency Particle collection

来源：评论

学校读者我要写书评

暂无评论

Development of an open source library for reinforced concrete membrane element analysis

引用

STRUCTURES 2021年 34卷 4882-4891页

作者： Mello, Andre Felipe Aparecido Trautwein, Leandro Mouta Almeida, Luiz Carlos Souza, Rafael Alves Univ Estadual Campinas Civil Engn Postgrad Program Campinas Brazil Univ Estadual Campinas Civil Engn Architecture & Urbanism Fac Campinas SP Brazil Univ Estadual Maringa Dept Civil Engn Maringa PR Brazil

In the 1960's, concrete structures subjected to plane stresses started being idealized as a combination of two-dimensional components called membrane elements. After several research groups having collected experimental data from reinforced concrete panels, material's constitutive models were improved to better describe shear behavior. The Modified Compression Field Theory (MCFT) was developed by University of Toronto's research team and made good predictions for a wide range of structures. Much later, the Disturbed Stress Field Model (DSFM) was born as an upgrade to the previous model, correcting some deficiencies found in specific situations. This paper contributes in this field by developing an open source *** library, named RCMembrane, for analysis of membrane elements by MCFT and DSFM. The results were validated by comparing numerical solution to the experimental data of 72 reinforced concrete panels. For Disturbed Stress Field Model (DSFM), a new relation is proposed for minimizing concrete's compression softening effect in panels subjected to tensile stresses. In general, RCMembrane's solution algorithm obtained very near load capacity prediction for those two distinct formulations, with a slightly smaller coefficient of variation in DSFM results. Next, RCMembrane must be applied to full finite element formulations, so further conclusions can be taken from numerical simulations of usual reinforced concrete structures.

关键词： Reinforced concrete Membrane elements Nonlinear analysis

来源：评论

学校读者我要写书评

暂无评论

Compliance and the social space of cities: Variations in compliance with Covid-19 regulations and capital forms in urban communities

引用

CITIES 2023年 141卷

作者： Israel, Emil Feder, Tal Israel Inst Technol Technion Technion Fac Architecture & Town Planning Urban & Reg Planning Program Haifa Israel Technion Israel Inst Technol Fac Architecture & Town Planning IL-32000 Haifa Israel

Cities' planned and built environments are key to healthier communities. The Covid-19 pandemic challenged this relationship, when the issue of communities' compliance with government restrictions to mitigate the spread of the pandemic became apparent. Despite the growing literature on the relationship between communities' characteristics and Covid-19 throughout the pandemic, little attention has been paid to the drivers of compliance at the city and community levels. Our paper addresses this lack through the Bourdieusian concept of communities' capital resources. Using Israel as a test case, we explore how the economic, social and cultural capital of urban communities affected compliance with Covid-19 related restrictions. The analysis reveals how the spatial dispersion of the components of these forms of capital explains the likelihood of communities' level of compliance. In particular, it shows how the accumulation of various forms of capital increased compliance with health regulations. The study highlights the explanatory power of local resources in collective spatial behavior patterns, as well as the possibility of exacerbating existing injustices.

关键词： Compliance Public health Covid-19 Spatial capital Social space Habitus

来源：评论

学校读者我要写书评

暂无评论

Surveys of community garden affiliates and soils in Houston, Texas

引用

ENVIRONMENTAL MONITORING AND ASSESSMENT 2022年第5期194卷 1-13页

作者： Kirsch, Katie R. McDonald, Thomas J. Newman, Galen D. Xu, Xiaohui Horney, Jennifer A. Univ Delaware Program Epidmiol 100 Discovery BlvdRoom 731 Newark DE 19713 USA Texas A&M Univ Dept Environm & Occupat Hlth College Stn TX USA Texas A&M Univ Dept Landscape Architecture & Urban Planning College Stn TX USA Texas A&M Univ Dept Epidemiol & Biostat College Stn TX USA

Although urban community food gardens have the capacity to strengthen and support neighborhoods in need, the benefits of such operations must be considered in tandem with the potential risks associated with urban environmental contamination. Therefore, research is needed to characterize existing community gardens in urban areas. In the present study, a survey of Houston, TX, community gardeners (N = 20) was conducted to better understand their risk-based knowledge and perceptions, current gardening practices, and willingness to implement risk mitigation measures. Soil samples collected from the beds (N = 22) and surrounding grounds (N = 24) of existing community garden sites in Houston, TX, were screened for trace and heavy metals using X-ray fluorescence spectrometry. The survey indicated that community gardeners had few concerns with regard to potential soilborne hazards and were generally willing to use diverse strategies to reduce potential hazards related to garden soil contamination. Ground and garden bed soil collected from community gardens were found to have excess concentrations of arsenic compared to federal health screening limits. The information provided here provides insight into possible discordance between community gardening risk perception and contamination risk that could be addressed through outreach, engagement, and remediation approaches.

关键词： Garden Soil screening Survey Urban agriculture

来源：评论

学校读者我要写书评

暂无评论

A study on photon/neutron interaction parameters with some alloys implant frequently used in orthopedics

引用

RADIATION PHYSICS AND CHEMISTRY 2025年 235卷

作者： Akman, F. Turhan, M. F. Ogul, H. Ozdogan, H. Turhan, M. K. Bingol Univ Vocat Sch Social Sci Dept Property Protect & Secur Program Occupat Hlth & Safety TR-12000 Bingol Turkiye Afyonkarahisar Hlth Sci Univ Ataturk Vocat Sch Hlth Serv Dept Med Imaging Tech TR-03200 Afyonkarahisar Turkiye Sinop Univ Fac Engn & Architecture Dept Nucl Engn Sinop Turkiye Antalya Bilim Univ Vocat Sch Hlth Serv Turkiy Akdeniz Blv 90 TR-07085 Antalya Turkiye Izmir Katip Celebi Univ Fac Med Dept Orthoped & Traumatol Izmir Turkiye

Some Ti and Co-based alloys are used for implant purposes in orthopedics. These implants may cause artifacts during imaging in radiology. These may cause image quality to deteriorate due to glare in the relevant area. In the presented study, radiation protection efficiency (RPE), mass attenuation coefficient (mu/rho, MAC), linear attenuation coefficient (mu, LAC), half value layer (HVL), mean free path (MFP), tenth value layer (TVL), effective atomic number (Zeff) at 30-150 keV, energy-absorption build-up factor (EABF) and exposure build-up factor (EBF) at 0.015-15 MeV and kerma relative to air parameters at 0.001-20 MeV were obtained for some Ti and Cobased alloys, which frequently used in orthopedics. Photon interaction parameters were calculated using WinXCOM, MCNP6, PHITS, FLUKA and GEANT4 methods. EABF, EBF and kerma relative to air parameters were investigated theoretically with the help of WinXCOM. In addition, to investigate the neutron interaction parameters of these implants, RPE values at different thicknesses at 4.5 MeV with FLUKA, total macroscopic cross section and mean free path with GEANT4 and effective removal cross section for fast neutron with theory were obtained. Mass attenuation coefficients for the Ti-based alloys and Co-based alloys were determined as in the range from 0.159 cm2 g- 1 to 6.466 cm2 g- 1 and 0.200 cm2 g- 1 to 10.791 cm2 g- 1 in the energy range from 30 keV to 150 keV, respectively. It has been observed that among TiAl6V, Ti6Al7Nb, Grade1, Co28Cr6Mo, Co20Cr15W10Ni and Co35Ni20Cr10Mo implants, Co20Cr15W10Ni has the best attenuation ability for photons and neutrons.

关键词： Orthopedic material Gamma photon MCNP6 PHITS FLUKA

来源：评论

学校读者我要写书评

暂无评论

Integrity with Extraction Faults in LiDAR-Based Urban Navigation for Driverless Vehicles

Integrity with Extraction Faults in LiDAR-Based Urban Naviga...

引用

IEEE Symposium on Position Location and Navigation (PLANS)

作者： Kana Nagai Yihe Chen Matthew Spenko Ron Henderson Boris Pervan Mechanical and Aerospace Engineering Illinois Institute of Technology Chicago U.S. Landscape Architecture + Urbanism Program Illinois Institute of Technology Chicago U.S.

This paper examines the safety of LiDAR-based navigation for driverless vehicles and aims to reduce the risk of extracting information from undesired obstacles. We define the faults of a LiDAR navigation system, derive the integrity risk equation, and suggest landmark environments to reduce the risk of fault-free position error and data association faults. We also present a method to quantify feature extraction risk using reflective tape on desired landmarks to enhance the intensity of returned signals. The high-intensity returns are used in feature extraction decisions between obstacles and pre-defined landmarks using the Neyman-Pearson Lemma. Our experiments demonstrate that the probability of incorrect extraction is below 10 −14 , and the method is sufficient to ensure safety.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Beyond Desakota: the urbanization process and spatial restructuring in contemporary Vietnam

引用

URBAN RESEARCH & PRACTICE 2023年第4期16卷 582-604页

作者： Hong, Nami Kim, Saehoon Seoul Natl Univ Interdisciplinary Program Urban Design Seoul South Korea Seoul Natl Univ Grad Sch Environm Studies Dept Landscape Architecture Urban Design Concentrat Seoul South Korea Seoul Natl Univ Environm Planning Inst Seoul South Korea Seoul Natl Univ Integrated Major Smart City Global Convergence Seoul South Korea

This study explored Vietnam's urbanization process and spatial restructuring over the last 30 years to conceptualize a new phenomenon challenging the concept of desakota. We constructed socioeconomic and urban land cover data from 1987 to 2018. Furthermore, we compared the urbanization process with the economic transition and mapped urban land growth patterns. The study found the following urbanization features: (1) fluctuating process of urbanization by development stage in a transitional economy, (2) formation of heterogeneous spatial patterns in metropolitan regions, (3) dramatic landscape changes caused by capitalistic property developments, and (4) functional reordering among urban centers and newly urbanized areas.

关键词： Spatial urbanization urban land growth desakota Vietnam developing countries Southeast Asia

来源：评论

学校读者我要写书评

暂无评论

Investigation of Gamma Ray Shielding Characteristics of Binary Composites Containing Polyester Resin and Lead Oxide

引用

POLYMERS 2024年第23期16卷 3324页

作者： Ozdogan, Hasan Uncu, Yigit Ali Akman, Ferdi Polat, Hasan Kacal, Mustafa Recep Antalya Bilim Univ Vocat Sch Hlth Serv Dept Med Imaging Tech TR-07190 Antalya Turkiye Akdeniz Univ Vocat Sch Tech Sci Dept Biomed Equipment Technol TR-07070 Antalya Turkiye Bingol Univ Vocat Sch Social Sci Dept Property Protect & Secur Program Occupat Hlth & Safety TR-12000 Bingol Turkiye Bingol Univ Vocat Sch Tech Sci Dept Architecture & Urban Planning TR-12000 Bingol Turkiye Giresun Univ Arts & Sci Fac Dept Phys TR-28100 Giresun Turkiye

Ionizing radiation plays an essential role across various fields but also poses significant health risks, requiring effective shielding solutions. This study focuses on the photon shielding properties of PbO-reinforced composites, specifically PbO-0, PbO-2, PbO-4, PbO-6, PbO-8, and PbO-10, through experimental measurements of photon energies ranging from 59.5 keV to 1408.0 keV. The measurements were taken using an HPGe detector. Experimental results were compared to theoretical calculations. Among the tested composites, PbO-10, which contains the highest concentration of lead oxide (PbO), provided the most effective radiation shielding. This sample demonstrated superior mass and linear attenuation coefficients, offering excellent protection at low photon energies. Furthermore, PbO-10 exhibited the lowest half-value layer (HVL) and tenth-value layer (TVL) values, indicating its efficiency in reducing radiation intensity with thinner material layers. It was determined that the experimental TVL results for PbO-O, PbO-2, PbO-4, PbO-6, PbO-8, and PbO-10 at 59.5 keV photon energy were 9.95, 5.98, 4.77, 3.67, 3.22, and 2.71 cm, respectively. With these outstanding attenuation capabilities, PbO-10 is deemed highly suitable for use in medical, industrial, and radiation-heavy environments. In summary, this research emphasizes the effectiveness of PbO-reinforced composites in gamma-ray shielding, with PbO-10 emerging as the top performer, demonstrating great potential for applications that require durable and efficient radiation protection.

关键词： radiation shielding PbO-reinforced composites mass attenuation coefficient linear attenuation coefficient HPGe detector

来源：评论

学校读者我要写书评

暂无评论

Acquisition of Key Vacuum-Assisted Resin Transfer Molding Parameters through Reverse Scanning for Application in the Manufacturing of Large Fiber-Reinforced-Plastic Products

引用

INTERNATIONAL JOURNAL OF POLYMER SCIENCE 2023年第12023期2023卷 7927196-7927196页

作者： Luo, Guang-Min Chen, Kai-Lin Hsu, Chen-Ting Natl Kaohsiung Univ Sci & Technol Dept Naval Architecture & Ocean Engn Kaohsiung Taiwan Natl Kaohsiung Univ Sci & Technol Ph D Program Maritime Sci & Technol Kaohsiung Taiwan

Software-based mold flow analysis is often performed to confirm optimized resin pipe arrangements. In this study, the GeoDict software and reverse scanning were employed to develop a method for performing rapid porosity and permeability estimation. A comparison of the results from one-dimensional resin flow and Easyperm tests revealed a 10% variation in the porosity and permeability parameters obtained through the proposed rapid estimation method. In addition, the obtained parameters were substituted into a Moldex3D model to simulate the resin flow on the personal watercraft hull during vacuum-assisted resin transfer molding (VARTM). A comparison of simulation results and hull infusion results revealed that the integration of the proposed rapid estimation method with Moldex3D allowed for the accurate simulation of the resin flow in large fiber-reinforced-plastic (FRP) products (variation <8%). The proposed method can be applied to large wind turbine FRP parts and large FRP yacht components to increase process planning efficiency and product stability.

关键词： Resin transfer molding

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：