The celebration of fifty years of the History of Economics Society (HES) is a wonderful achievement. It is a pity that the majority of the founding members are not alive to see this landmark. The initial seeds were planted in 1968, with a gathering run by Donald Winch at the University of Sussex, and watered the following year by A. W. “Bob” Coats at the University of Nottingham, who produced the first British History of Economic Thought newsletter. These meetings, and discussions at the annual meetings of the Allied Social Science Associations (ASSA), prompted the formation of the journal History of Political Economy (HOPE), with the first issue appearing in the spring of 1969.1 The idea of forming the HES was seriously broached in Chicago in 1973, and the first official meeting was held in Chapel Hill (North Carolina) the following year, although HES had already mounted four sessions in New York City at the 1973 ASSA meetings.

Motivated by practical applications of inspection and maintenance, we have developed a wall-climbing robot with passive compliant mechanisms that can autonomously adapt to curved surfaces. At first, this paper presents two failure modes of the traditional wall-climbing robot on the variable curvature wall surface and further introduces the designed passive compliant wall-climbing robot in detail. Then, the motion mechanism of the passive compliant wall-climbing robot on the curved surface is analyzed from stable adsorption conditions, parameter design process, and force analysis. At last, a series of experiments have been carried out on load capability and curved surface adaptability based on a developed principle prototype. The experimental results indicated that the wall-climbing robot with passive compliant mechanisms can effectively promote both adsorption stability and adaptability to variable curvatures.

This article delves into the post-war urban planning of Racibórz (Ger. Ratibor), a mid-size city in Poland, shedding light on the socialist city’s historical roots and its adherence to socialist urbanism models. Using planning maps and other archival documents, it examines the reconstruction process that aimed at creating green spaces and quality housing, while at the same time revealing its medieval past. The article also investigates the city’s deviation from known recovery patterns and highlights a lesser known approach to creating a city with a national form and socialist content. Overall, this research offers a comprehensive exploration of a reconstruction process in a mid-size city, enriching the understanding of European post-war urban history.

In what follows, I use stylized facts derived from my own professional career as a member of the History of Economics Society (HES) and the history of economics (HE) community to document and illustrate the changing context of the subdiscipline over the past three decades.1 In the 1990s, the subdiscipline was comprised of a number of national communities. Among the latter the North American community held a dominant position and was quite different from its continental European counterparts, the French and Italian in particular.2 Not only were its academic culture and environment much more competitive but they were also more open to non-disciplinary history of economics.3 Over the past two decades, however, the growing domination of the continental European community has created a new context in which the identity of the North American community in general and that of the HES in particular has become uncertain.

The role of external actors has now been widely acknowledged in shaping social policy processes in sub-Saharan Africa. Yet, the social policy roles and influence of philanthropic donors have been less recognised and examined. As various countries in the region seek to expand social policy implementation and delivery and revitalise the development of national welfare systems, it is important to better understand the roles and functions of philanthropic donor agencies in the processes of agenda-setting, financing, and delivery of social policy. This article discusses the complex social policy functions held by philanthropic donor agencies in sub-Saharan Africa through the lens of the “welfare mix,” drawing attention to the divergencies and convergences between Western philanthropic donors and their African counterparts, while reflecting on the direction of future research agendas.

This study aimed to examine and compare the effectiveness of a novel spray-dried inoculant and a commercial freeze-dried additive on the fermentation quality, aerobic stability and bacterial population of vetch-oat silage. An entirely random design used a 3 × 4 factorial arrangement of treatments, with and without lactic acid bacteria (LAB) inoculants and four fermentation periods. Physicochemical parameters, microbiological counts and 16S rRNA gene sequencing analysis on Nanopore MinION were conducted to characterize the ensiling process. Both LAB inoculants increased dry matter, crude protein, lactic, acetic and propionic acid contents, while reducing pH, neutral detergent fibre, ammonia nitrogen/total nitrogen and ethanol concentrations compared to the control group. Overall, the native inoculant decreased the cell load of coliforms, yeasts and moulds. In addition, bio-inoculants enhanced the aerobic stability of vetch-oat intercrops. After ensiling, bacterial alpha diversity decreased noticeably; inoculation reduced the number of observed operational taxonomic units and the Shannon and Simpson indices. Notably, the relative abundance of Lactobacillus in the control group was lower than in treated silages, while the relative values of Staphylococcus increased sharply in the uninoculated group. In conclusion, the native strains showed promise for usage as a bio-inoculant in the ensiling of vetch-oat at a mixture rate of 1:1, producing an immediate impact as well as a favourable effect on the post-opening phase. This represents the first report on 16S rRNA gene-based nanopore metagenomics applied to the bacterial analysis of vetch-oat silage, providing a microbiological insight where native and commercial strains dominate the natural epiphytic community.

Aimed at the challenges of wide-angle mobile robot visual perception for diverse field applications, we present the spherical robot visual system that uses a 360° field of view (FOV) for realizing real-time object detection. The spherical robot image acquisition system model is developed with optimal parameters, including camera spacing, camera axis angle, and the distance of the target image plane. Two 180$^{\circ}$-wide panoramic FOVs, front and rear view, are formed using four on-board cameras. The speed of the SURF algorithm is increased for feature extraction and matching. For seamless fusion of the images, an improved fade-in and fade-out algorithm is used, which not only improves the seam quality but also improves object detection performance. The speed of the dynamic image stitching is significantly enhanced by using a cache-based sequential image fusion method. On top of the acquired panoramic wide FOVs, the YOLO algorithm is used for real-time object detection. The panoramic visual system for the spherical robot is then tested in real time, which outputs panoramic views of the scene at an average frame rate of 21.69 fps and panoramic views with object detection at an average of 15.39 fps.

We apply the Evans–Kishimoto intertwining argument to the classification of actions of discrete amenable groups into the normalizer of a full group of an ergodic transformation. Our proof does not depend on the types of ergodic transformations.

I defended my doctoral dissertation on stochastic stability of general equilibrium systems in Penn’s Applied Mathematics program in fall 1968. That year I began teaching math for economists, mathematical economics, microeconomics, and even econometrics at Rutgers College, where I remained for a couple of years before moving to Duke. At Rutgers I saw that graduate students took required courses in micro, macro, statistics, math, and econometrics, and there were electives in other fields like public finance and economic history. I didn’t know that there was any subdiscipline, or field, called the history of economic thought.

Let $(X,T)$ and $(Y,S)$ be two topological dynamical systems, where $(X,T)$ has the weak specification property. Let $\xi $ be an invariant measure on the product system $(X\times Y, T\times S)$ with marginals $\mu $ on X and $\nu $ on Y, with $\mu $ ergodic. Let $y\in Y$ be quasi-generic for $\nu $. Then there exists a point $x\in X$ generic for $\mu $ such that the pair $(x,y)$ is quasi-generic for $\xi $. This is a generalization of a similar theorem by T. Kamae, in which $(X,T)$ and $(Y,S)$ are full shifts on finite alphabets.

We define the topological multiplicity of an invertible topological system $(X,T)$ as the minimal number k of real continuous functions $f_1,\ldots , f_k$ such that the functions $f_i\circ T^n$, $n\in {\mathbb {Z}}$, $1\leq i\leq k,$ span a dense linear vector space in the space of real continuous functions on X endowed with the supremum norm. We study some properties of topological systems with finite multiplicity. After giving some examples, we investigate the multiplicity of subshifts with linear growth complexity.

The domestication of rice increases the divergence between cultivated rice and its wild progenitor because of artificial selection. However, it remains unknown whether highly diverged loci in rice can be explained by neutral demographic scenarios alone. In this study, we genotyped 45 InDels (insertion/deletion) in two subspecies of Asian cultivated rice (Oryza sativa ssp. japonica and Oryza sativa ssp. indica) and their wild progenitor (O. rufipogon/O. nivara). Among them, 17 loci are highly diverged (FST > 0.4) between rice cultivars and their ancestor. We performed coalescent-based simulations on neutral demographic scenarios and found that neutral demography alone could explain the polymorphic profiles on those highly diverged loci between cultivated and wild rice. Therefore, more signatures of selection should be considered when detecting artificial selection in rice.