Generative adversarial networks (GANs) have recently been proposed as a potentially disruptive approach to generative design due to their remarkable ability to generate visually appealing and realistic samples. Yet, we show that the current generator-discriminator architecture inherently limits the ability of GANs as a design concept generation (DCG) tool. Specifically, we conduct a DCG study on a large-scale dataset based on a GAN architecture to advance the understanding of the performance of these generative models in generating novel and diverse samples. Our findings, derived from a series of comprehensive and objective assessments, reveal that while the traditional GAN architecture can generate realistic samples, the generated and style-mixed samples closely resemble the training dataset, exhibiting significantly low creativity. We propose a new generic architecture for DCG with GANs (DCG-GAN) that enables GAN-based generative processes to be guided by geometric conditions and criteria such as novelty, diversity and desirability. We validate the performance of the DCG-GAN model through a rigorous quantitative assessment procedure and an extensive qualitative assessment involving 89 participants. We conclude by providing several future research directions and insights for the engineering design community to realize the untapped potential of GANs for DCG.

This paper aims to provide an analysis of the metatextual function of one of the most well-known elements of Martial's Epigrams, the ‘lion and hare’ cycle from Book 1. This cycle, in which a hare is held precariously but safely in the jaws of a lion, has historically been read as representing the relationship between Domitian and poet. This paper aims to expand on this reading of the cycle while considering a largely unexplored point of view: the metatexual function of this cycle within Martial's larger epigrammatic project. I identify three major ways in which the cycle supports Martial's larger interests in exploring poetic anxieties and defending the genre of epigrammatic poetry. First of all, by figuring the lion and the hare as, respectively, the emperor and the poet, Martial presents and performs an exemplum modelling clemency in the reception of lascivious poetry. Second, as a sexual metaphor that points to the anxiety and insecurity of both predator and prey, the cycle anticipates a broader concern of the Epigrams: the instability of Roman hierarchical relations and the difficulty of maintaining balance within such relationships. Third, Martial's continued use of hare imagery in the later books of the Epigrams, both in culinary and in hunting contexts, suggests the continued consumption and enjoyment of the genre of epigram, particularly outside of the imperial city.

A high-resolution numerical simulation of an air–water turbulent upward bubbly flow in a pipe is performed to investigate the turbulence characteristics and bubble interaction with the wall. We consider three bubble equivalent diameters and three total bubble volume fractions. The bulk and bubble Reynolds numbers are $Re_{bulk}= u_{bulk} D/\nu _w = 5300$ and $Re_{bub}= (\langle u_{bub}\rangle - u_{bulk}) d_{eq}/\nu _w = 533\unicode{x2013}1000$, respectively, where $u_{bulk}$ is the water bulk velocity, $\langle u_{bub}\rangle$ is the overall bubble mean velocity, $D$ is the pipe diameter and $\nu _w$ is the water kinematic viscosity. The mean water velocity near the wall significantly increases due to bubble interaction with the wall, and the root-mean-square water velocity fluctuations are proportional to $\bar {\psi }(r)^{0.4}$, where $\bar {\psi } (r)$ is the mean bubble volume fraction. For the cases considered, the bubble-induced turbulence suppresses the shear-induced turbulence and becomes the dominant flow characteristic at all radial locations including near the wall. Rising bubbles near the wall mostly bounce against the wall rather than slide along the wall or hang around the wall without collision. Low-speed streaks observed in the near-wall region in the absence of bubbles nearly disappear due to the bouncing bubbles. These bouncing bubbles generate counter-rotating vortices in their wake, and increase the skin friction by sweeping high-speed water towards the wall. We also suggest an algebraic Reynolds-averaged Navier–Stokes model considering the interaction between shear-induced and bubble-induced turbulence. This model provides accurate predictions for a wide range of liquid bulk Reynolds numbers.

China’s strong economic presence in Africa has resulted in an increased interdisciplinary debate. Our contribution is the incorporation of a business perspective by uncovering the prominence and role of business in China’s diplomatic Africa engagement. Our theoretical contribution by applying the state-business relations (SBR) literature is to examine whether established frameworks can be expanded by an international dimension through intergovernmental initiatives like the Forum on China-Africa Cooperation (FOCAC). The paper conducts a document analysis of all declarations and Action Plans of all FOCAC conferences in the period 2000–2021, combining both a content and a thematic analysis based on an explorative and iterative coding process. Our data suggests that the prominence of businesses has increased while the scope of their activities and the number of focus sectors (especially infrastructure) has risen particularly since 2012. Companies are considered as enablers for political and economic goals in the state-driven FOCAC. We find that SBR frameworks are applicable to international contexts and propose an expanded SBR approach integrating transnational intermediary institutions like the intergovernmental FOCAC and transnational business platforms which facilitate positive state-business relations across countries and a conducive business environment.

The sustainability of grazed rangelands can be improved by adopting innovative management practices that enhance the ecological resilience, productivity, and long-term viability of rangeland ecosystems. This study applied a bivariate Multiple Indicator–Multiple Causation model to examine how landowner characteristics are associated with their perceptions concerning patch-burn grazing (PBG) and mixed-species grazing (MSG). Data were collected through a mail survey of landowners in the Southern Great Plains who own at least 100 acres. The significant and positive correlation between PBG and MSG suggests that their relative preference tends to change together, potentially allowing them to complement when implemented together.

In 1975, the Ugandan state established an Economic Crimes Tribunal to investigate and penalize smuggling, hoarding, overcharging, and other commercial malfeasance. In the coming years, innumerable Ugandans were arrested and charged with contravening the state's economic regulations. Prior observers have seen this as another instance of a capricious state, but in this article, I demonstrate the popular investment in economic regulation. Ugandans demanded better stewardship of money and things because they were aghast at the ungovernable world of commodities. For one thing, the inaccessibility of so-called “essential commodities” — sugar and salt, preeminently — impeded ethical expectations surrounding social reproduction, hospitality, and masculine respectability. More troubling, essential commodities were not completely unavailable; rather, they were available on exclusionary and confusing terms. Relative deprivation was more upsetting than absolute scarcity because it offended a sense of consumptive entitlement. As a result, it was not only the state that accused citizens of economic crimes. There were widespread accusations in which allegation and denunciation circulated among neighbors, families, and bureaucrats in an urgent effort to discipline commodities and people.

Postcolonial governments often restrict the market alienability of land rights for various policy reasons. One policy aims to treat all citizens equivalently and safeguard vulnerable social communities equally, as an unrestrained land market could allow one affluent social group to buy out one that is less affluent. Another policy is to set a standard that is easy to apply in the same way in every case, as a bright-line rule banning land alienation is simpler to administer than a standard that requires case-by-case considerations. Today, in Ethiopia, such laws face opposition from proponents of a free market economy and private property rights. Thus, international development institutions and influential Ethiopians are spearheading an ambitious reform to Ethiopia’s post-socialist law that bans land alienability, arguing that the law has impeded social and economic progress. This article shows, however, that the legal ban has never prevented land transfers. Many people have utilized legal constructs such as gifts, bequests, loans, and leases to sell their land. Such transfers have circumvented the ban amidst aggressive land expropriation by the state and other agents. These intricate local and national dynamics undercut the misleading sense of regularity created by the inalienability law, raising serious questions about the persistent demand by international development institutions to privatize land rights and create land markets through law reform without paying close attention to the lived experiences at the local level.

In April 2020, President of the European Commission Ursula von der Leyen called for a “Marshall Plan for Europe.”1 Almost a year after her appeal, the European Union implemented the recovery and resilience program Next Generation EU (NGEU). NGEU, we show, shares several features with the Marshall Plan, including size, redistributive allocation, conditional grantmaking, and the pursuit of a distinct political agenda. But the new Marshall Plan also differs from the old. NGEU is financed through common EU debt rather than an infusion of funds from the United States. Marshall aid was disbursed almost entirely as grants, while NGEU funds consist of a mix of grants and loans. Further, NGEU is unprecedented in distributing grants in exchange for post-austerity and climate-friendly reforms and investments, rather than budget cuts. This alternative model, we argue, can serve as a template for international financial institutions such as the International Monetary Fund (IMF) and the World Bank.

This contribution analyses the EU’s new data acts. Interoperability is a common denominator of the EU’s new data acts. This paper demonstrates that the new data acts provide various approaches or concepts of collaborative governance to regulate interoperability. Although the EU’s new data acts are far from a uniform governance concept, we detected certain institutional arrangements organising the collaboration between private self-regulatory bodies, other private stakeholders and public bodies to lay down rules for interoperability.

This study relies on the prevalence of certain structures that largely distinguish the creation and reception of music from that of language – namely, temporal grids, scalar grids, and segments with their repetitions – to construct a model of the human cognitive faculty for music that allows humans to make music the way they do. The study draws on research and thought in philosophy (including phenomenology), linguistics, psychology, and neurology, coupled with musicology, to produce a model of a human capacity to make complex comparisons between ongoing sound sequences and those simultaneously reconstructed from memory by registering the relativities within their flow. This model is then used in a consideration of how the faculty for music interacts with the faculty for language in the experience of song and a consideration of how a similar cognitive capacity for music might be identified in other species.

Many Organization for Economic Co-operation and Development countries invest heavily in labor-market programs to prolong careers. Although active labor-market programs have frequently been evaluated, less is known about passive programs supporting unemployed seniors financially. We focus on the latter by investigating the hiring opportunities of candidates who partake in a regime that ensures dismissed seniors a company supplement alongside regular unemployment benefits. Therefore, we conduct a scenario experiment in which genuine recruiters evaluate fictitious candidates who have spent varying durations unemployed in regimes with and without the company supplement. Because recruiters evaluate candidates' hireability and productivity perceptions, we can identify underlying mechanisms. Overall, we find no evidence of employer-side stigma hindering the re-employment of seniors unemployed in the program. Conversely, longer-term unemployed even benefit from this regime because it mitigates regular stigmatization of long-term unemployment, especially for men. Specifically, recruiters judge them more mildly – particularly regarding flexibility – when they receive the supplement and still apply.

Addis Ababa initiated a universal Home-Grown School Feeding Program (HGSFP) in February 2019 to address hunger and improve the educational outcomes of schoolchildren. This study aimed to document the perceived benefits and challenges of the HGSFP in Addis Ababa, where such information was lacking. In May 2023, a qualitative phenomenological study was conducted to collect data from 20 schools participating in the HGSFP. Data were collected through key informant interviews and focus group discussions (FGDs) involving 98 purposively selected participants. The study encompassed 48 student mothers in 5 FGDs, 20 student interviews, 20 school principals, and 10 experts from the Ministry of Education, Sub-cities, and the School Feeding Agency for in-depth interviews. Data collected in the local language were transcribed, translated into English, and thematically analysed using ATLAS-TI software. The study’s findings unveiled the transformative impact of the HGSFP in Addis Ababa, Ethiopia. It demonstrated remarkable improvements in attendance, concentration, academic performance, reduced dropout rates, financial relief, enhanced behaviour, and a safer learning environment. However, urgent measures are imperative to tackle pressing challenges such as underpaid kitchen workers, operational issues, reduced reading time, rising food costs, limited market access, inadequate infrastructure, and growing dependency. To ensure the enduring sustainability of HGSFP, addressing challenges like workload reduction, kitchen infrastructure enhancement, government guideline implementation, promoting self-reliance, overcoming budget limitations, and addressing school gardening obstacles is vital.

One of the most recognizable cases of preimplantation genetic diagnosis (PGD) is X-linked diseases. Diagnosis of fetal sex is essential for couples who are known to be at risk of some X-linked disorders. The objective of this study was to discriminate between female (XX) and male (XY) embryos by detecting sex chromosomes-specific sequences in spent culture medium and comparing these results to PGD/CGH array results. It may open new window for the development of a non-invasive PGD method. 120 Embryo’s spent media from Day 3 and Day 5 embryos were collected. Modified phenol-chloroform solution was used for DNA extraction from spent media. Sex determination was performed using SRY, TSPY and AMELOGENIN evaluation through quantitative polymerase chain reaction (q-PCR) method. IBM SPSS and MedCalc were used for statistical analyses to compare sex determination of embryos by spent medium with PGD/CGH array results. Culture time was demonstrated to increase the DNA amount among day 5 embryos culture medium samples. Non-invasive PGD by means of spent culture medium gave a sensitivity, specificity, positive predictive value and negative predictive value of 100% for sex determination. Results of sex determination using spent medium by q-PCR were consistent with the results of PGD/CGH array. Improvements in cell-free DNA extraction and PCR amplification procedures provide us an effective method to perform a PGD test without biopsy in the future, especially about X-linked diseases.

Federal law prohibits deceiving the public by falsely marking an item as patented. The “false marking” prohibition has been enforced primarily by private lawsuits on behalf of the United States, with the party plaintiff and the government splitting the penalty. When a court decision dramatically increased the potential recovery for false marking claims, lawyers pounced immediately, filing more cases per week than had previously been filed in years. Indeed, many lawyers who did not previously work on patent cases joined the fray. Within two years, Congress eliminated this type of false marking suit and terminated all pending cases. Using empirical data, interviews with lawyers, legislative history, litigation documents, and news sources, this article tells the instructive history of false marking litigation. This history shows that the supply of private enforcement—lawsuits by private parties to enforce laws in the public interest—is sensitive to market forces. It also shows that, even when concentrated interests encourage Congress to cut back on private enforcement, Congress does not move as quickly as the bar. This matters because once Congress authorizes private enforcement, the maintenance of that system depends on judges and lawyers interpreting private enforcement statutes.