Use of gestalt in wayfinding design and analysis of wayfinding process

The authors brought forward the definition of “Gestalt space” and indicated this kind of space can be easily cognized. Three experiments showed that “classification” and “grouping” are the human strategies to solve wayfinding problems. “Similarity” and “Legibility” of the space are advantageous to help people to complete wayfinding tasks. The designer should provide the essential “Legibility” in Gestalt space, by using some techniques such as “break” and “accession” to settle the wayfinding problem. __________ Translated from Architectural Journal, 2007, (5): 89–91 [译自: 建筑学报]     

Statistical and mathematical sources of regional science theory: Map pattern analysis as an example

Krugman states that “Regional science is not a unified subject. It is best described as a collection of tools.” Unfortunately such a perspective fails to fully acknowledge theoretical dimensions of the accompanying refocusing on geographic expressions of economic linkages, such as those highlighted in spatial externalities specifications. Such promulgated aspects of the spatial economic landscape relate to map pattern, and certainly the spatial statistics and spatial econometrics theory that accompanies it, as well as the underlying substantive theory garnered from a variety of sources. The principal implication is other than “loose- jointed, do-the-best-you-can theorizing”. Received: 22 November 1997 / Accepted: 10 March 1998     

Housing management matters: Citizenship and managerialism in the new welfare market

This paper addresses three neglected issues in the restructuring of housing policy and provision in the UK in the 1980s and 1990s: first, the relationship between welfare restructuring and management regimes; second, the nature of local variations in the impact of welfare restructuring; and third, the significance of human agency interpretations of change. The paper starts by summarizing the main features of welfare state restructuring and then considers recent manifestations of citizenship and managerialism in housing. Three competing conceptions of citizenship rights are used to examine changing notions of welfare: “market efficiency”, “institutionalized rights” and the “radical challenge” provided by social movements. A four-part typology of the main concepts and themes in the “new public management”—“efficiency”, “downsizing and decentralization”, “excellence” and “public service”—is used to present the main components of change in management regimes. The paper draws on literatures on housing management, citizenship and “the new public management” and on recent research into tenant participation, housing rights and housing advice services. Conclusions are drawn about how tensions between different conceptions of citizenship and public management are implicated with national and global influences at the local level to create particular welfare outcomes.     

"Composition" and regularisation of architectural production in contemporary China

The purpose of this paper is to explore how the “Beaux-Arts” “composition” sustained the constitution of design principles for architectural production in China in the last two decades of the twentieth century. “Composition”, a key technique of the “Beaux-Arts” system, is not a simple act of “putting elements together” into a unified whole, but also relates to an array of different “constructions” of architectural knowledge which regulate and sustain the act of design. Through analysing the structure of three “textbooks” published in the early 1980s, this paper examines three aspects of the “constructions”: the setting up of the principles for governing architectural forms, regularisation of design methods and approaches for architectural practice, and the construction of a “tradition” for the expression of “Chineseness”.     

Economic impacts of subsidized housing relocation

In recent years increased emphasis has been placed on use of “tenant-based” housing subsidies for acquisition of market-rate housing that is more economically and racially integrated than traditional “project-based” public housing. In this article, we model the short-term economic effects upon various groups of a hypothetical program in which low-income families move from inner-city public housing to spatially dispersed Section 8 rental housing. Using cross-section data from the Chicago region, impacts are computed for two of these groups. Preliminary results indicate that the short-term net economic impact of this hypothetical housing relocation is negative, that these impacts have a spatial character, and that there is a potential tradeoff between tenant benefits, housing subsidies from society and housing integration. Received: 20 January 1998 / Accepted: 30 November 1998     

Mechanisms of large-scale landslides in China

Large-scale landslides in western China are famous for their size, complex formation mechanism and serious destruction. Data were collected from some typical large-scale landslides in mainland China in the 20th century. A number of geo-mechanical models have been identified: the “three sections” model (sliding; tension cracking; shearing), “retaining wall collapse”, “horizontal-pushing” in horizontal strata; large-scale toppling in counter-inclined strata; the creep-bending–shearing model etc. Large-scale rock landslides are generally accompanied by sudden brittle failure of the “locking section” along the potential sliding surface. The paper discusses the importance of this “locking section” which is key to assessing slope geohazard and to the development of control/mitigation measures.     

Measuring the effects of air quality regulations on “dirty” firm births: Evidence from the neo- and mature-regulatory periods

In this article, we use annual (1980–90) county-level manufacturing plant location data for New York State to examine the effects of the 1977 Clean Air Act Amendments on the location decisions of new pollution-intensive manufacturing plants in the “:neo-regulatory” (1980-84) and “mature-regulatory” (1985–90) phases of the Act's implementation. Our results suggest that the temporal effects of regulation vary. Whereas the location decisions of pollution intensive manufacturing firms were unaffected by the Act's regulatory restrictions in the “neo-regulatory” period, the restrictions appear to have had a significant negative impact on the location decisions of these types of firms in the Act's “mature-regulatory” phase. The diversion of new pollution intensive plants to counties with less stringent environmental regulations suggests that current US environmental regulations may be leading to a “browning process” whereby counties historically free of pollution become havens for polluters. Received: 2 April 1999 / Accepted: 18 October 1999     

Negatives in symmetric input–output tables: the impossible quest for the Holy Grail

In the Supply-Use (or Make-Use) input–output models, “product-technology” (PT) or “fixed-industry-sales-structure” (FISS) assumptions are more widely adopted (SNA, Eurostat) for deriving symmetric input–output tables (SIOT) than “industry-technology” or “fixed-product-sales-structure” assumptions, but generate negatives in the SIOT. A SIOT deduced from the Supply-Use model is considered as satisfactory as soon as it contains no more negatives; scholars have focused on the negatives in the SIOT and on how to remove them. However, as a SIOT may include no negatives even if there are some negatives in the inverse Supply matrix, we have completely reversed the reasoning. A counter-example demonstrates that computing the inverse Supply matrix, as imposed by PT or FISS assumptions, is mathematically a nonsense operation even when the symmetric input–output tables do not include any negative; this result is new. Hence, deriving a SIOT under PT or FISS assumption must be rejected. Three applications are provided: Austria 2000 and 2005 and USA 2007.     

Simulation of a building and its HVAC system with an equation solver: Application to benchmarking

The today-availability of powerful engineering equation solvers is opening very new possibilities in technical component modelling and in system simulation. The simulation models, the “user guide” and the “reference guide” are all included in a same file. Reliable “reference” and “simplified” models are currently available for the building zone and for most (heating, ventilation and air-conditioning) HVAC components. Focus is given here on “simplified” models and on a simulation tool, called “Benchmark”. This tool should help an auditor to make the best use of the limited information usually available about actual fuel and electricity consumptions and to get a very first evaluation of the actual performances of a given HVAC system. An example of such use is presented. Another simulation tools and more information about the modelling of HVAC components will be presented in a further paper.     

Intra-Asia trade and foreign direct investment

This article reconsiders the patterns of intra-Asia trade and the linkages with foreign direct investment (FDI) in this region. The following conclusions are drawn. Firstly, by 1985 intra-Asia trade exhibited both distinct patterns of inter-industry trade on the one hand, and intra-industry trade on the other. Secondly, the patterns of trade in this region have not changed since 1985 from vertical to horizontal, but from a “flying-geese” to an “acrobatic” type, due to the sharp increase in FDI within the region. Thirdly, since the early 1990s, FDI began to shift to China due to the wage differentials between China and other East Asian countries. This made the countries of East Asia compete with one another, rushing to obtain capital and financial resources from all over the world – ultimately contributing to recent financial and economic turbulence in the region. The article concludes with some brief policy recommendations on how to avoid a recurrence of the Asian crisis in the 21 century. Received: 18 August 1997 / Accepted: 16 December 1998     

An evaluation of the effects of various parameter weights on typical meteorological years used for building energy simulation

In this paper, we evaluate the influence of different parameter weights in creating “typical year” weather data following the typical meteorological year (TMY) methodology, by studying two sets of 3600 alternate weather files created using different parameter weights for Beijing (China) and New York City (USA). A “typical year” weather file consists of twelve distinctive months, each considered typical for that month of the year. Such a typical month, named “typical meteorological month (TMM),” is commonly identified by using a certain combination of parameter weights, such as 4:4:4:12, for dry bulb temperature, dew point temperature, wind speed, and solar radiation as in the TMY weather files developed by US National Climate Data Center (NCDC), or 4:4:2:10 in the newer TMY2 and TMY3 weather files developed by National Renewable Energy Laboratory (NREL). In this study, we investigate the influence of varying the parameter weights on the TMMs and the resultant new TMY weather files (nTMY). We found that the distribution of new 3600 TMMs tend to cluster within one or a few years for each month, and that the probabilities are very high for significant overlap between the new TMMs and the original TMMs chosen using the TMY/TMY2 weighting. Compared to the TMM data in TMY, the deviations of air temperatures and solar radiation values of the new TMMs and nTMYs derived from the 20-year weather data are less than 10% for both Beijing and New York. This confirms that the creation of “typical year” weather data is not very sensitive to the weighting of the different weather parameters, and that most nTMYs created and evaluated in this study are empirically close to the TMY data intended for use of simulating building energy consumption.     

Inter-regional labor market equilibrium: another pattern of spatial mismatch

The inability of the free market to lead to a balanced regional labor market equilibrium has been explained to a certain extent by the spatial mismatch hypothesis: “housing segregation” explains a deadlock situation where a “center” with high unemployment and low income coexists with “suburbs” with high labor demand and income. The author proposes a framework for a theoretical general equilibrium model that may explain the existence of a spatial equilibrium with inequalities in employment and income in various regions. This model explains the interregional imbalances on the labor demand side due to the changes in relative land prices and agglomeration economies and diseconomies in three separate types of economic sectors. On the labor supply side, the model suggests a pattern of a commuting–migration relationship by which labor migrates for housing reasons while retaining present jobs and commuting back to them. Government intervention through influence on travel costs, education, and land allocation can lead to the diminution of such interregional gaps.     

Reply to the alternative optimal growth controls

Sasaki (2002) argues that: (1) “the agglomeration effect in the (Lai and Yang 2002, (L-Y)) paper is different from the introduction of urban production in Sasaki (1998)”; and (2) the “treatment of public good in the (L-Y) paper is strange,” because the public good provided by owner-residents is only consumed by renter-residents. This reply shows that (1) the agglomeration effect in the L-Y model catches the key results of urban production presented in Sasaki's model; and (2) both renter and owner-residents consuming the public good have been developed in this reply. However, the major conclusions of the L-Y model are still hold. Received: February 2001/Accepted: September 2001     

A design method for seepage barriers with allowance for the initial filtration gradient

A method is presented for calculation of the basic parameters of an anti-seepage “wall” with allowance for the initial filtration gradient of the filler material. The case of plane-radial seepage through a contour “wall” of the perfect and imperfect type, which is constructed by various modifications of the “wall-in-the-ground” method and using kinematic jet energy, is discussed. Computational analytical relationships and working equations for a number of special cases are derived in general form for the schemes under consideration. A software package, which makes it possible to make a rational projection of structural parameters of the “wall” and determine the position of the depression curve ahead of the “wall,” is developed. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, Nos. 4–5, pp. 37–42, July–October, 1998.     

Durban’s pursuit of economic development in the post-apartheid era

The city in South Africa has “been forced to engage in serious soul-searching about their role in a new political order while facing up to complex and dynamic global economic forces” (Hall and Robbins, 2002, p. 43)     

Optimal facility placement and discriminatory congestion pricing in neighborhoods with different time costs

In many urban areas, time costs or wages vary between neighborhoods, but there is little wage variation within a given neighborhood. Neighborhoods are often labelled “working class,”“middle class,” or even “wealthy.” For this reason, there are many efficiency and distributional issues related to location because location largely determines access costs. Congestion also affects time costs and access. Many public policies are geared towards improving access for households in low-wage neighborhoods. Public facilities are built; some firms receive nonprofit status. In order to evaluate these policies, normative theory is needed. This paper develops theory on the optimal placement of facilities and their congestion prices in urban areas with wage variation between neighborhoods. The results show that optimal locations and prices depend on the extent of wage inequality. Received: February 2001/Accepted: September 2001     

Evolution, interaction and welfare An introduction

A jubilee often triggers backward-oriented reflections, sometimes nostalgic. A jubilee can also be used as an excuse for looking forward. This special issue is composed in honour of ?ke E. Andersson, delayed in the sense that the anniversary (60 years) dates back to 1996. The contributions to this volume have also gone through a maturing process in the form of reviews and revisions. The contributions are organised in three thematic groups. The themes appear in the sequence “Evolution”, “Welfare”, and “Interaction”.     

Cultural activities as a location factor in European competition between regions: Concepts and some evidence

The main aim of this paper is to provide a theoretical background and empirical evidence on the importance of the cultural sector for competitiveness and development of the regional economy. It is argued that the fall of barriers to trade and the movement of capital and labor in the European Single Market will result in a transformation of the forces shaping its spatial structure. Consequently, the theory of international trade looses its capacity to explain the volume and structure of exchange between regions, which are or belong to different states within the European Union. On the other hand, the theory of spatial distribution of economic activities becomes increasingly relevant for explaining movements of the factors of production and patterns of interregional specialisation.  Based on a case study, the paper analyses the influence of “soft” location factors, in particular cultural activities, on the competitive position of producers located in different urban regions. The “cultural multiplier” approach is used to measure direct income flows resulting from such activities while the concept of externalities is employed to analyse the indirect effects. Received: March 1997/Accepted: July 1998     

Regional development of employment in eastern Germany: an analysis with an econometric analogue to shift-share techniques

We extend in this analysis an approach introduced by Patterson and suggested by M?ller and Tassinopoulos. Our approach uses a generalization of an econometric analogue of the common shift-share method, suggested here as a new “workhorse” for regional analyses. The results obtained with this shift-share-regression, and with very differentiated data from the employment statistics of eastern Germany, show that processes of deconcentration play a role in explaining regional disparities, since inverse localization and positive urbanization effects are visible. The relevant processes can be understood by implementing approaches of “new economic geography”, structural change and endogenous growth theory.     

Spatial dependence and the representation of space in empirical models

A well-formed spatial model should most likely not produce spatial autocorrelation at all. From this perspective spatial autocorrelation is not (pure) statistical nuisance but a sign of that a model lacks a representation of an important economic phenomenon. In a Knowledge Production Function (KPF) context, this paper shows that a representation of space reflecting the potential of physical interaction between localities by means of accessibility variables on the “right-hand-side”—a simple alternative to spatial lag and spatial error which can be estimated by OLS—captures substantive spatial dependence. Results are verified with Monte Carlo simulations based on Anselin’s (Int Reg Sci Rev 26(2):153–166, 2003) taxonomy of modelled and unmodelled effects. The analysis demonstrates that an accessibility representation of explanatory variables depict the network nature of spatial interaction, such that spatial dependence is actually modelled.