Search results

As historic cities evolve, change in their urban form can be expected. Yet, uncontrolled change of land plots, which represent a significant element of urban form, leads to uncontrolled change in buildings' configurations and typologies threatening accordingly the urban character of heritage contexts. Mechanisms controlling plot subdivision, however, can play an effective role in guiding developments and in controlling urban change in heritage settings. The present study seeks to assist decision-makers in their attempt to control urban change in heritage areas through a plot-based approach.

This paper is divided into three sections: the first focuses on plot subdivision as a key aspect of urban form; the second illustrates the case of the heritage village of New Gourna in Luxor and the third includes discussion and implications of adopting a plot-based morphological approach to control morphological transformation in heritage contexts. For the morphological analysis of New Gourna, the study relied on comparative cartographic analysis of original drawings of the village versus the situation in 2022. The morphological analysis focuses mainly on qualitative and quantitative aspects of plot configurations and building patterns.

Findings support the urgency of establishing a plot-based strategy to maintain urban character of heritage contexts in Egypt and call for a plot-based morphological approach to control change and inform new development attempts.

The present research provides an assessment of the morphological transformation of the heritage village of New Gourna. In addition, it proposes a plot-based approach for heritage contexts under transformation.

This paper analyses changes in the activity pattern of Damascus city from late modern era (late Ottoman rule) to the contemporary era. The research objective is to explore the impact of the socio-historical process on the evolving morphological structure of the urban core and to draw implications for post-war reconstruction.

Space Syntax methodology was employed to trace the historical and morphological changes in the urban core of Damascus. The timeframe was divided into five periods covering the city's socio-political transformation and five maps depicting these periods. Local and global integration measures were used to analyse the changes in the urban core across each period. Normalised angular choice (NACH) measure was used to identify the changes in the city planning system.

The results revealed that the urban core corresponded to the main streets, which had socio-economic importance across history. However, introducing a new planning system influenced by Western planning ideals led to the creation of multi-morphological patterns. At the city level, the study found that the urban core was more accessible in the preplanned areas, while the organic expansion of the informal settlements was exclusive of the core area. At the local level, some informal settlements showed an intense core. Intelligibility analysis revealed that earlier periods showed considerably higher values, implying declines in the ease of navigation of the city over time.

This study did not account for the political, economic and cultural factors that could shape morphological changes in Damascus. In addition, the study adopted historical reference points to understand the morphological changes, as high-quality geospatial data was not available to monitor the recent post-war situation.

The research findings give a foundation for a more contextualised historical understanding of spatial structure and changes, which can contribute to the post-war reconstruction and redevelopment of Damascus city.

To the best of the authors’ knowledge, this paper is the first to trace historical spatial changes in Damascus from a space syntax approach, weaving together socio-historical and configurational studies. In doing so, it shows how historically informed and spatially aware urban planning and design policies can support policymakers and built environment professionals in planning and redevelopment.

The swivel construction method is a specially designed process used to build bridges that cross rivers, valleys, railroads and other obstacles. To carry out this construction method safely, real-time monitoring of the bridge rotation process is required to ensure a smooth swivel operation without collisions. However, the traditional means of monitoring using Electronic Total Station tools cannot realize real-time monitoring, and monitoring using motion sensors or GPS is cumbersome to use.

This study proposes a monitoring method based on a series of computer vision (CV) technologies, which can monitor the rotation angle, velocity and inclination angle of the swivel construction in real-time. First, three proposed CV algorithms was developed in a laboratory environment. The experimental tests were carried out on a bridge scale model to select the outperformed algorithms for rotation, velocity and inclination monitor, respectively, as the final monitoring method in proposed method. Then, the selected method was implemented to monitor an actual bridge during its swivel construction to verify the applicability.

In the laboratory study, the monitoring data measured with the selected monitoring algorithms was compared with those measured by an Electronic Total Station and the errors in terms of rotation angle, velocity and inclination angle, were 0.040%, 0.040%, and −0.454%, respectively, thus validating the accuracy of the proposed method. In the pilot actual application, the method was shown to be feasible in a real construction application.

In a well-controlled laboratory the optimal algorithms for bridge swivel construction are identified and in an actual project the proposed method is verified. The proposed CV method is complementary to the use of Electronic Total Station tools, motion sensors, and GPS for safety monitoring of swivel construction of bridges. It also contributes to being a possible approach without data-driven model training. Its principal advantages are that it both provides real-time monitoring and is easy to deploy in real construction applications.

Sustainable development (SD) is vital in alleviating poverty, hunger and disease (PHD). The purpose of this study is to present a guiding framework with pathways targeting the sustainability challenges concerning PHD based on urban planning and design literature.

A narrative review and content analysis of 27 articles published by 11 journals indexed in Scopus were conducted using bibliometrics analysis.

The study’s findings discuss contemporary normative planning and design ideas and their ability to alleviate PHD. Considering these findings, the authors recommend that urban planning and design implementation processes carefully pursue the United Nations Sustainable Development Goals (SDGs) and Vision 2030 by tracking qualitative metrics that consider social, cultural and spiritual well-being.

The contribution is to propose a conceptual framework for alleviating hunger, poverty and disease through Vision 2030. Practitioners and policymakers can use this framework to assess the impact of their actions. Hunger, poverty and disease research could be guided by this framework to identify and prioritize best practices in cities of the Global South.

This study aims to review the effect of copper percentage in Sn-based solder alloys (Sn-xCu, x = 0–5 Wt.%) on intermetallic compound (IMC) formation and growth after laser soldering.

This study reviews the interfacial reactions at the solder joint interface, solder joint morphology and the theory on characterizing the formation and growth of IMCs. In addition, the effects of alloying and strengthening mechanism, including wettability, melting and mechanical properties are discussed.

This paper presents a comprehensive overview of the composition of tin-copper (Sn-Cu) solders with a potential to enhance their microstructure, mechanical characteristics and wettability by varying the Cu percentage. The study found that the best Cu content in the Sn-xCu solder alloy was 0.6–0.7 Wt.%; this composition provided high shear strength, vibration fracture life value and ideal IMC thickness. A method of solder alloy preparation was also found through powder metallurgy and laser soldering to improve the solder joint reliability.

This study focuses on interfacial reactions at the solder joint interface, solder joint morphology, modelling simulation of joint strength and the theory on characterising the formation and growth of IMC.

The paper comprehensively summarises the useful findings of the Sn-Cu series. This information will be important for future trends in laser soldering on solder joint formation.

This study presents an image processing algorithm capable of calculating selected flight parameters requested by flight control systems to guide aircraft along the horizontal projection of the landing trajectory. The parameters identified based on the basics of the image of the Calvert light system appearing in the on-board video system are used by flight control algorithms that imitate the pilot’s schematics of control. Controls were generated using a fuzzy logic expert system. This study aims to analyse an alternative to classical solutions that can be applied to some specific cases.

The paper uses theoretical discussions and breakdowns to create the basics for the development of structures for both image processing algorithms and control algorithms. An analytical discussion on the first stage was transformed into laboratory rig tests using a real autopilot unit. The results of this research were verified in a series of software-in-the-loop computer simulations.

The image processing method extracts the most crucial parameters defining the relative position of the aircraft to the runway, as well as the control algorithm that uses it.

In flight control systems that do not use any dedicated ground or satellite infrastructure to land the aircraft.

This paper presents the original approach of the author to aircraft control in cases where visual signals are used to determine the flight trajectory of the aircraft.

The purpose of this paper is to investigate the effect of different levels of place understanding (primarily typo-morphological analysis) on the nature of interventions within historic urban setting and buildings within the City of Amman.

The research methodology depended on an extensive thematic survey and analysis. The typo-morphological analysis addressed several of Amman's residential hills and their connections with the downtown area. The thematic place survey tool included different units of analysis (e.g. buildings, public spaces, streets and sloped lands between streets) and addressed the values of these various buildings and spaces, their typology, typo-morphology and relation to the urban context, nature of change and transformations over time to mention a few. The extensive survey also included semi-structured interviews about these buildings addressing their emergence, historic context and values.

The paper presents an architectural typology for Amman's architecture and its relationship with the city's morphology stressing the specificity of Amman's historic core and residential hills. The paper also discusses the effect of this level of place understanding on the nature and levels of interventions within historic settings and buildings.

This level of place understanding (typo-morphological analysis) can have a positive impact on the practice of architectural and urban conservation by informing the nature of interventions within historic urban setting and buildings within the city. More specifically, this level of place understanding can, first, inform the development of urban and heritage guidelines within conservation areas in one of Amman's residential neighborhoods (Weibdeh) and, second, inform the nature of interventions to existing historic buildings based on respect of building typology.

This paper contributes to the disciplines of architectural and urban conservation illustrating how place understanding can inform practices of heritage conservation and future policies and strategies concerning new intervention within such heritage places.

Rapid urbanization and development of pilgrimage cities cause significant problems for the environment and society, leading to long-term challenges. Despite several discussions on city sustainability, the literature does not address some of the specific problems of pilgrimage cities. Hence, this study attempts at developing a method to examine the growth pattern and sustainability of pilgrimage cities in southern part of India.

The benchmarking method and the social, economic and environmental dimensions of sustainability are considered to construct the Pilgrimage City Sustainability Index (PCSI). Appropriate variables and categories are identified through a literature review and expert opinion survey. The benchmark values of the variables are derived by contemplating the pilgrimage cities of Tamil Nadu, one of the states with the largest tourist arrivals in India. Subsequently, three prominent pilgrimage cities from Tamil Nadu were chosen for the case study and the method was tested.

The result reveals that the cities investigated are performing above average in the sustainability index, with slight variations in their dimension scores. While the category scores of cities assist in identifying macro-level issues, the variable scores provide an insight into micro-level issues. Furthermore, the gap analysis between the benchmark and the present value of each variable discloses the immediate area of attention in each city. Thus, the cities could set more specific targets, frame strategies and/or collaborate with matching cities to bridge these gaps.

This index assessment provides a comparison of the pros and cons of these pilgrimage cities and helps identify their demand and supply. Policymakers can find appropriate tools and approaches that aid in sustainable urban development and tourism management.

To the best of our knowledge, this is the first study in emphasizing the application of the benchmarking method to assess the sustainability of Indian pilgrimage sites. With appropriate modifications, this method can be used in varied contexts across the globe.

The emerging concept of smart city is known to aim at sustainable urban development. One of the requirements for a smart city is to address accessibility inequalities. This study aims to investigate the accessibility level issues in urban transformation before and after combining different street networks for Penang, Malaysia, as a case study to reveal greater insight and helpful information into mobility and accessibility inequalities for future smart city planning.

Using DepthmapX software, two main quantitative methodologies of space syntax, namely, spatial integration accessibility (SIA) and angular segment analysis by metric distance (ASDMA), are employed to analyse the level of accessibility for the main streets of George Town site before and after combination with contemporary networks. Integration, choice and entropy values were calculated for the study analysis.

Results revealed the implications of combining old irregular gridiron structures with the existing planned grid structures. George Town seems to have gained a higher capacity for pedestrian accessibility; however, vehicle accessibility has lost its capacity. Findings further suggest that a combination of irregular structure and grid structure is essential for urban growth in similar historical contexts to improve accessibility and address mobility inequalities.

The study concludes by highlighting the importance of the analysis of street structure transformation to predict consequences and promote the potential to reduce current inequalities in vehicle accessibility.

The purpose of this paper is to conveniently and accurately design partial knitting knitted fabrics based on matrix transformation.

Using mathematical modeling, the pattern diagram block matrix and process design matrix of partial knitting knitted fabrics are established, and the process knitting diagram with parameter information is generated. Based on the establishment of the mathematical model of the process knitting diagram, a loop deformation method based on three-dimensional (3D) coordinate point matrix transformation is proposed.

The matrix transformation method can provide a suitable deformed loop mode for partial knitting knitted fabrics and helps to generate a 3D modeling diagram conveniently.

This paper proposed a method of design and modeling of partial knitting knitted fabric based on matrix transformation. Taking the 3D modeling effect of conventional partial knitting as an example to test the modeling method, the results show that after matrix transformation, the loop model can realize the rapid transformation and calculation of the coordinates of the control point and generate a 3D modeling diagram.