We continue investigating variants of the splitting and reaping numbers introduced in [4]. In particular, answering a question raised there, we prove the consistency of and of . Moreover, we discuss their natural generalisations $\mathfrak {s}_{\rho }$ and $\mathfrak {r}_{\rho }$ for $\rho \in (0,1)$, and show that $\mathfrak {r}_{\rho }$ does not depend on $\rho $.

Middle Eastern or North African (MENA) Americans are an understudied speech community in sociolinguistics. In terms of racial classification and identification, MENA Americans have been legally and historically classified as white but are not socially perceived as white (Beydoun, 2013, 2015). While early immigrants from MENA regions to the US were mostly Christians, ever since 1947, the majority of immigrants from MENA regions to the US have been from Muslim backgrounds (Orfalea, 2006); this demographic change can result in more ethnic visibility for MENA Americans in the US (cf., e.g., Shryock & Lin, 2009, for a discussion of ethnic visibility of MENA Americans in southeastern Michigan). Higher ethnic visibility can in turn lead to certain linguistic performances on the part of MENA Americans. Several studies have looked at the interaction of ethnic identity/visibility and local vowel patterns such as the merging of the low back vowels (the vowels in THOUGHT and LOT1). For example, Hall–Lew (2009) showed that Asian Americans in San Francisco took part in the low back vowel merger and high back vowel fronting, which both index local meanings being part of the California Vowel Shift (Eckert, 2008). Going beyond one particular locality, Wong and Hall–Lew (2014) demonstrated clear influence of local dialect on the speech of Asian Americans in two different localities, with Asian Americans from NYC having distinct low back vowels and those from San Francisco merged low back vowels. Comparing the speech of three different ethnic groups in the multicultural context of Toronto, Hoffman and Walker (2010) explored two features of the Canadian Vowel Shift: the retraction of TRAP and the lowering and retraction of DRESS. Their findings showed that while Chinese Canadians disfavored these two patterns, British/Irish and Italian Canadians favored them. In another study in the context of California English, Cardoso et al. (2016) looked at subclasses of the TRAP vowel in the speech of Chinese Americans and white Americans of San Francisco. They found that the nasal split of TRAP (it being raised when followed by a nasal consonant, and being retracted and lowered when followed by an oral consonant) was more advanced for white speakers than the Chinese group. Cardoso et al. (2016) associated the observed difference to the social meaning of the TRAP nasal split in California indexing white or non-Chicanx social personae.

In tropical regions, water stress is one of the main causes of the reduction in forage productivity, and irrigation strategies can mitigate the problem, especially for highly productive species. The objective of this study was to evaluate the effects of irrigation, genotype and plant size on productive responses and water use efficiency (WUE) of elephant grass (Cenchrus purpureus [Schumach.] Morrone), in the rainy and dry season. The experimental design was randomized in blocks, arranged in split plots, the main plots were established based on the use of irrigation and the subplots were the tall-sized genotypes (IRI 381 and Elephant B) and dwarfs (Taiwan A-146 2.37 and Mott). The genotypes were evaluated for two years and harvested every 60 days. Water use efficiency, total forage accumulation per year and harvest, forage accumulation rate and forage density were evaluated. There was a significant difference between the genotypes in terms of total forage accumulated (P < 0.05). The most productive genotype was IRI 381, which showed the greatest total forage accumulation (42 168 kg of DM/ha in two years) in the irrigated plots. During the rainy seasons, IRI 381 stood out in terms of forage accumulated (24 667 kg of DM/ha). Irrigation favoured increases in forage accumulation around 60%, in both years of evaluation. Irrigation and plant size influenced the productivity and WUE of elephant grass harvested in 60-day intervals. Tall genotypes and Taiwan A-146 2.37 (dwarf size) stood out in most of the productive traits analysed, while Mott was highlighted by its forage density.

For a perturbed generalized Korteweg–de Vries equation with a distributed delay, we prove the existence of both periodic and solitary waves by using the geometric singular perturbation theory and the Melnikov method. We further obtain monotonicity and boundedness of the speed of the periodic wave with respect to the total energy of the unperturbed system. Finally, we establish a relation between the wave speed and the wavelength.

A robust literature on climate change and security developed in the 2010s. Much of the literature attempts to chart how climate change could contribute directly or indirectly to conflict and instability through impacts on agriculture, migration, and disasters (Busby 2018; Koubi 2019; Theisen 2017).1 The methodological challenge is that climate change is an emergent problem, wherein the security consequences largely have yet to occur. However, the field’s methods and expertise are primarily explanatory of past patterns. For scholars who want to make claims about future security risks, Gledistch (1998, 394) warned of potentially slipping into prophecy. If scholars want to write about climate change and retain academic rigor, what are they to do? This article reviews the challenges for scholars in this space and identifies potential research strategies that might be pursued going forward.

When Timor–Leste became the first new nation of the 21st century in 2002, one of the many decisions that needed to be made concerned language. Timor–Leste is a country of around one million people, with at least 16 indigenous languages and three foreign languages contributing to its multilingual character. For reasons related to its 400-year colonial history and the resistance to Indonesian occupation from 1975 to 1999, the new constitution declared that Portuguese would be one of two official languages, the other being the indigenous Tetun Dili. The choice of Portuguese rather than English was controversial, and criticised in some quarters, for it appeared to defy geographical location (e.g. Savage, 2012). After all, Australia lies an hour's flight south of Timor–Leste, and English has been adopted as the working language of ASEAN, an organisation which the country has aspirations of joining. English is certainly the regional lingua franca, and very often referred to as the global lingua franca. Not, however, that the constitution was ignoring this reality. As well as naming Portuguese and Tetun as official languages, it named English and Bahasa Indonesia as working languages, and all indigenous languages as national languages. Thus the decisions around language in the constitution laid claims to identity and culture, as well as remaining open to global engagement in trade, technology, education and other contributors to modernisation.

Climate change is fundamentally a political problem; it is not merely a technical or economic challenge but rather an arena for sharp conflicts over the distribution of gains and losses and the associated ethical challenges. However, as Keohane (2015), Javeline (2014), and Green and Hale (2017) noted in PS: Political Science & Politics and Perspectives on Politics, research on climate change has not been traditionally central to mainstream political science. Field journals including Global Environmental Politics and Environmental Politics have made important contributions in this regard, and leading university presses have published important books on climate issues. However, the neglect of climate politics by mainstream journals is surprising—although we note the recent Perspective on Politics symposium on Green Political Science—because political scientists have devoted considerable attention to studying environmental politics at the community (Ostrom 1990), national (Kelemen and Vogel 2010), and international (Young 1994) levels. Indeed, there is robust literature on the management of common pool resources, national styles of environmental regulation, and environmental social movements, as well as global environmental regimes. Yet, the topic of climate change—an important subject in the study of environmental politics—too often has been neglected by mainstream political science.

The Nevanlinna-type spaces $N_\varphi $ of analytic functions on the disk in the complex plane generated by strongly convex functions $\varphi $ in the sense of Rudin are studied. We show for some special class of strongly convex functions asymptotic bounds on the growth of the Taylor coefficients of a function in $N_\varphi $ and use these to characterize the coefficient multipliers from $N_\varphi $ into the Hardy spaces $H^p$ with $0<p\leqslant \infty $. As a by-product, we prove a representation of continuous linear functionals on $N_\varphi $.

Given a set $S=\{x^2+c_1,\dots,x^2+c_s\}$ defined over a field and an infinite sequence $\gamma$ of elements of S, one can associate an arboreal representation to $\gamma$, generalising the case of iterating a single polynomial. We study the probability that a random sequence $\gamma$ produces a “large-image” representation, meaning that infinitely many subquotients in the natural filtration are maximal. We prove that this probability is positive for most sets S defined over $\mathbb{Z}[t]$, and we conjecture a similar positive-probability result for suitable sets over $\mathbb{Q}$. As an application of large-image representations, we prove a density-zero result for the set of prime divisors of some associated quadratic sequences. We also consider the stronger condition of the representation being finite-index, and we classify all S possessing a particular kind of obstruction that generalises the post-critically finite case in single-polynomial iteration.

The use of the OpenAI GPT-4 model in detecting catheter-associated urinary tract infection (CAUTI) cases in small fictitious and curated patient data sets was investigated. Final analysis of 50 patients including 11 CAUTI cases yielded sensitivity, specificity and positive and negative predictive values of 91%, 92%, 83%, and 96%, respectively.

Globally, questions have been asked on how police utilized additional powers created to manage the spread of the COVID-19 virus without negatively impacting police legitimacy. This was particularly a concern in countries that had hitherto recorded high incidents of police misconduct prior to the emergence of the pandemic. Using a victim-centered approach, a qualitative study was conducted to examine the dimensions of unlawful use of force, human rights violations, and other police misconduct which prevailed during the enforcement of the COVID-19 lockdown in Nigeria. In all, 82 interviews with victims of police violence were conducted, and a thematic analysis of the narratives was carried out. Findings indicate negative perceptions of police legitimacy to intervene in public health crises. In building better community relations that will engender public compliance with police directives, the police authority is advised to purge itself of its militarized system, with officers undergoing procedural justice training and imbibing its principles.

To confront the climate crisis, we need political change involving a dramatic shift in domestic and transnational norms. Norm models should be recognized as one of the theoretical tools within the panoply of approaches to examine and address climate change. The most promising norm campaigns underway are those that target fossil fuel companies and government policies that support them (e.g., subsidies).

The effects of school and classroom racial/ethnic diversity on peer victimization, self-blame, and perceived school safety were examined in a racially/ethnically diverse sample of students followed over the three years of middle school. Sixth grade students (N = 5,991, 52% female; M = 11.63 years) were recruited from 26 urban middle schools that systematically varied in racial/ethnic diversity. Based on student self-report, the sample was 31.6% Latino/Mexican, 19.6% White, 17.4%, Multiethnic/Biracial, 13% East/Southeast Asian, 10.9% Black, and 6.9% Other very small racial/ethnic groups. Each school had a structural diversity score based on the number and size of racial/ethnic groups enrolled. Using a novel method based on course schedules and class rosters, each student’s individual exposure to diversity in their classes was assessed to capture dynamic diversity. Latent growth modeling showed that structural school diversity and dynamic classroom diversity were both related to less victimization at the start of middle school and a decrease over time. Dynamic classroom diversity buffered the associations between victimization and self-blame and between victimization and perceiving school as unsafe. Dynamic classroom diversity was more protective than structural school diversity. Implications for practice, intervention and policies to promote school racial/ethnic diversity were discussed.

Ethical decision making in disaster and emergency management requires more than good intentions; it also asks for careful consideration and an explicit, systematic approach. The decisions made by leaders and the effects they have in a disaster must carry the confidence of the community to which they serve. Such decisions are critical in settings where resources are scarce; when decisions are perceived as unjust, the consequences may erode public trust, result in moral injury to staff, and cause community division. To understand how decisions in these settings are informed by ethics, a systematic literature review was conducted to determine what ethical guidance informs decision making in disaster and emergency management. This study found evidence of ethical guidance to inform decision making in disaster management in the humanitarian system, based on humanitarian principles. Evidence of the application of an ethical framework to guide or reference decision making was varied or absent in other emergency management agencies or systems. Development and validation of ethical frameworks to support decision making in disaster management practice is recommended.

Integrating the resource-based view (RBV) and attention-based view (ABV), this study explores the impact of firm-specific knowledge (FSK) on a firm's exploratory innovation and the role of government support in this process. We argue that firms with a high degree of specificity in their knowledge assets tend to have a more localized attention focus, leading to those firms with less exposure to distant and diverse information and knowledge. Consequently, such firms are likely to have reduced exploratory innovative outputs. However, government resource support could expand a firm's attention focus beyond local searches, mitigating its negative effects. Based on a unique combined two-wave survey and archival data from over 500 firms in China, we find that the level of FSK is negatively related to a firm's exploratory innovation output. We provide evidence that localized attention focus partially mediates the negative effect of FSK on firms’ exploratory innovation. We further reveal that state ownership and state financial support for firm innovation weaken the negative main effect. This study makes important contributions to the literatures on the RBV, FSK, and firm innovation.

Clinical supervision is a relationship-based education, considered crucial in providing clinicians with emotional support, skill development and improving client outcomes. Culturally responsive supervision assumes that culture permeates clinical practice and supervision. Culturally responsive supervisors promote the development of cultural competence in supervision, through modelling, reflective discussion and responsivity. Research has demonstrated that greater perceived cultural responsivity in supervision may result in greater satisfaction for supervisees, particularly those from racially or ethnically minoritised (REM) backgrounds. The current study explores supervisee perceptions of culturally responsive supervision and supervisory relationships between different supervisory dyads, comprising supervisees from REM and White backgrounds. This was a cross-sectional design incorporating a between-groups comparison. Trainee and qualified clinical psychologists, counselling psychologists and CBT therapists (n = 222) completed an online survey. Perceptions of cultural responsivity and the supervisory relationship were explored. Participants provided information about their supervisor’s race and ethnicity and their own, and were organised into four supervisory dyads. Participants from REM backgrounds in dyads with White supervisors perceived their supervision as significantly less culturally responsive, with significantly lower quality supervisory relationships. Greater perceived cultural responsivity in supervision significantly predicted better supervisory relationships (regardless of participant cultural background). Findings suggest that culturally responsive supervisory practices may play an important role in developing cultural competence and strengthening the supervisory relationship, particularly in cross-cultural supervisory dyads. Findings present important clinical and theoretical implications.