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Since cannabis was legalized in Canada in 2018, its use among older adults has increased. Although cannabis may exacerbate cognitive impairment, there are few studies on its use among older adults being evaluated for cognitive disorders.
Methods:
We analyzed data from 238 patients who attended a cognitive clinic between 2019 and 2023 and provided data on cannabis use. Health professionals collected information using a standardized case report form.
Results:
Cannabis use was reported by 23 out of 238 patients (9.7%): 12 took cannabis for recreation, 8 for medicinal purposes and 3 for both purposes. Compared to non-users, cannabis users were younger (mean ± SD 62.0 ± 7.5 vs 68.9 ± 9.5 years; p = 0.001), more likely to have a mood disorder (p < 0.05) and be current or former cigarette smokers (p < 0.05). There were no significant differences in sex, race or education. The proportion with dementia compared with pre-dementia cognitive states did not differ significantly in users compared with non-users. Cognitive test scores were similar in users compared with non-users (Montreal Cognitive Assessment: 20.4 ± 5.0 vs 20.7 ± 4.5, p = 0.81; Folstein Mini-Mental Status Exam: 24.5 ± 5.1 vs 26.0 ± 3.6, p = 0.25). The prevalence of insomnia, obstructive sleep apnea, anxiety disorders, alcohol use or psychotic disorders did not differ significantly.
Conclusion:
The prevalence of cannabis use among patients with cognitive concerns in this study was similar to the general Canadian population aged 65 and older. Further research is necessary to investigate patients’ motivations for use and explore the relationship between cannabis use and mood disorders and cognitive decline.
Was the Hindu code in fact ‘gender-just’? Why have feminists increasingly made the argument that ‘uniformity’ is not ‘gender justice’? What are the kinds of gender-just personal laws that are being discussed by feminist groups?
As we have seen, the debates about women's inheritance and marriage laws were brought to the foreground by women themselves as early as the 1930s and climaxed in the passage of the Hindu Code Bills in 1956. The discussion spanned a 15-year period and occurred in three different parliaments: the federal parliament, the provisional parliament and the first elected parliament of India. The debates, both within the legislature/parliament and in the public life of the new nation (for example, in feature films, novels and newspaper debates), about the real and imagined consequences of passing the proposed Hindu code into law, constitute a major milestone in post-independence India. It revealed that entrenched patriarchal interests, despite stating their commitment to women's equality, revealed great hostility to translating these into substantive legal provisions.
Is Uniformity Equal to Gender Justice?
The Constituent Assembly (consisting of 15 women in an assembly of 299), which assured women that they would not be discriminated against on the grounds of sex, nevertheless provided exactly such a possibility in the name of religious freedom, which allowed for the continuance of religion-based personal laws. Although the freedom of religion is strictly subject to the fundamental rights listed in part three of the Indian constitution, and also provides for social reform, it was seen as setting a limit on individual freedoms. B. R. Ambedkar, as a framer of the constitution, protested in vain against the retention of personal laws:
The religious conceptions of this country are so vast that they cover every aspect of life from birth to death. There is nothing that is not religious and if personal law is to be saved, I am sure about it, in social matters we shall come to a standstill…. After all, what are we having this liberty for? We are having this liberty to reform our social system which is so full of inequalities, discriminations and other things which conflict with our fundamental rights.
Normative conflict is at the centre of many current discussions about order and change in world politics. In this article, we argue that studying normativity in practice is necessary when analysing processes of global ordering, such as negotiating, cooperating, or protesting. Practices are imbued with normativity. This key aspect, however, remains often overlooked in current International Relations (IR) practice research due to a conservative bias that treats practices mainly as patterned. Focusing on normativity reveals the inherent contestation of practices, providing a conceptual avenue for understanding how international practices oscillate between social order and change. Normativity can be defined as evaluating criteria experienced in practice and used for the contextualised moral judgement of public performances. This perspective is relevant for IR scholars interested in how relational, contested, and learning processes relate to order and ordering in world politics. We propose taking a comprehensive approach hereto based on three key dimensions: how normativity is enacted and disputed in practice; how it must be learnt as practical knowledge in communities; and, how ambiguity remains due to the multiplicity of rules applied in everyday situations. We illustrate our approach by examining global protests in different fields (sports, the environment, and peace).
This article explores the causes of nationalist civil war, a subtype of ethnic civil war in which anti-state actors fight for greater communal autonomy. It presents a theoretical framework claiming that grievances over lost communal autonomy commonly motivate nationalist civil war, but that other conditions are needed to put this motive into action: Nationalist frames and expectations must make communities sensitive to lost autonomy, and mobilizational resources must be available so actors can organize nationalist movements. Nation-state building, in turn, commonly promotes reductions in communal autonomy, and British colonial pluralism frequently strengthened nationalist frames, expectations, and mobilizational resources, suggesting that nationalist civil war should be common in former British colonies after transitions from empire to nation-state. To test the framework, this article provides a comparative historical analysis of Zomia, a region that has the highest concentration of nationalist civil wars in the world and in which half of the countries are former British colonies. The analysis provides strong evidence supporting the theoretical framework.
Narrow bracketers who are myopic in specific decisions would fail to consider preexisting risks in investment and neglect hedging opportunities. Growing evidence has demonstrated the relevance of narrow bracketing. We take a step further in empirical investigation and study individual heterogeneity in narrow bracketing. Specifically, we use a lab experiment in investment and hedging that elicits subjects’ preferences on rich occasions to uncover the individual degree of narrow bracketing without imposing distributional assumptions. Combining prospect theory and narrow bracketing can explain our findings: Subjects who invest more also insure more, and subjects insure significantly less in the loss domain than in the gain domain. More importantly, we show that the distribution of the individual degree of narrow bracketing is skewed at two extremes, yet with a substantial share of people in the middle who partially suffer from narrow bracketing. Neglecting this aspect, we would overestimate the severity of narrow bracketing and misinterpret its relation with individual characteristics.
There are 117.3 million people forcibly displaced because of war, conflict and natural disasters: 40% are children. With growing numbers, many high-income countries have adopted or are considering increasingly restrictive policies of immigration detention. Research on the impact of detention on mental health has focused on adults, although recent studies report on children.
Aims
To synthesise data on the impact of immigration detention on children’s mental health.
Method
Systematic searches were conducted in PsycINFO, MEDLINE and Embase databases and grey literature and studies assessed using PRISMA guidelines (PROSPERO registration CRD42023369680). Included studies were quantitative, assessed children younger than 18 years who had been in immigration detention and reported mental health symptoms or diagnoses. Methodological quality was assessed using the Appraisal Tool for Cross-Sectional Studies. Meta-analyses estimated prevalence for major depression and post-traumatic stress disorder (PTSD).
Results
Twenty-one studies reported data on 9620 children. Most studies were cross-sectional, had small sample sizes and used convenience sampling. A profoundly detrimental impact on children’s mental health across a variety of countries and detention settings was demonstrated. Meta-analysis found pooled prevalence of 42.2% for depression [95% CI 22.9, 64.3] and 32.0% for PTSD [95% CI 19.4, 48.0]. Severity of mental health impact increased with exposure to indefinite or protracted held detention.
Conclusions
Immigration detention harms children. No period of detention can be deemed safe, as all immigration detention is associated with adverse impacts on mental health. Our review highlights the urgency of alternative immigration policies that end the practice of detaining children and families.
We study the length of short cycles on uniformly random metric maps (also known as ribbon graphs) of large genus using a Teichmüller theory approach. We establish that, as the genus tends to infinity, the length spectrum converges to a Poisson point process with an explicit intensity. This result extends the work of Janson and Louf to the multi-faced case.
Research on individual decisions from experience reveals a robust tendency to behave as if rare events are underweighted. Experimental studies of strategic interactions often exclude probabilistic outcomes, thus neglecting the potential extension of this tendency to strategic games. Our study addresses this gap by examining how players in games adjust their strategies when confronted with low-probability, high-impact outcomes. We introduce two finitely repeated, asymmetric games with lottery-based payoffs. These games, when simplified by replacing lotteries with their expected values, yield straightforward equilibrium predictions based on dominant strategies. However, results from three experiments reveal players strongly deviate from these predictions, instead behaving consistently with underweighting of rare events. The results additionally indicate that social preferences also play a role in shaping behavior. To explain these observations, we propose the simplistic Reciprocal Altruistic Sampler (REALS) model. This model posits that players’ decisions are a result of the interplay between reliance on small samples of past experiences, altruistic tendencies, and strategic considerations. We experimentally compare behavior in variants of the games that disentangle the behavior to these three components, and show that the REALS model, despite its simplicity, effectively captures their complex interactions. Our results additionally demonstrate that players can often choose strictly dominated strategies in a sophisticated effort to react to underweighting of rare events by other players. Overall, this study enhances our understanding of strategic decision making by highlighting the crucial impact of rare events and the interplay of different uncertainties in influencing players’ choices.
We revisit the model problem of Squires & Brady (Phys. Fluids, vol. 17, 2005, 073101), where a Brownian probe is dragged through a dilute dispersion of Brownian bath particles. In this problem, the microrheology due to excluded-volume interactions is represented by an effective viscosity, with the nonlinearity in the driving force entering via the dependence of the viscosity increment (relative to the viscosity of a pure solvent) upon the deformation of the dispersion microstructure. Our interest is in the limit of large Péclet numbers, $ P{\kern-1pt}e\gg 1$, where the microstructural deformation adopts the form of a boundary layer about the upstream hemisphere of the probe. We show that the boundary-layer solution breaks down at the equator of the probe and identify a transition region about the equator, connecting the layer to a downstream wake. The microstructural deformation in this region is governed by a universal boundary-value problem in a semi-bounded two-dimensional domain. The equatorial region continues downstream as a transition layer, which separates the wake of the probe from the undisturbed ambient; in that layer, the microstructure is governed by a one-dimensional heat-like equation. Accounting for the combined contributions from the respective asymptotic provinces we find the approximation $ ({1}/{2})[1+ (\ln P{\kern-1pt}e + 1.046)/ P{\kern-1pt}e]$ for the ratio of the large-$ P{\kern-1pt}e$ viscosity increment to the corresponding linear-response increment. Our asymptotic approximation is in excellent agreement with the increment predicted by a finite-difference numerical calculation of the microstructure deformation, tailored to the large-$ P{\kern-1pt}e$ topology.
Nothing short of a tectonic shift in feminist legal studies has occurred in the two decades since Women and Law in Colonial India was published in 1996. Where I had, at the end of the introduction to the original edition, lamented that a significant body of legal historical scholarship was yet to take shape, the intervening period has seen the emergence of a very sophisticated set of historical investigations which have uncovered not only new kinds of archives, but suggested innovative ways of interpreting old ones. In part, the scholarship has paralleled the extraordinary visibility of legal institutions and questions of law in determining the contours of gender justice and gender relations more generally. The new scholarship has had the effect of challenging some of the assumptions of the earlier edition, refining many of its enquiries and adding to the insights that it drew on.
The new historical investigations have been prompted in part by developments in three interlocking spheres: first, the concerns, disappointments and engagements of contemporary Indian feminism with the domain of law reform, including emerging disagreements between feminists themselves on the wisdom of expanding the domain of state law into greater areas of women's social lives, and possible alternatives that can be explored, given the limits of due processes; second, an increased legal literacy in Indian society more generally, including perverse and wilful use of the legal system as a weapon, and not always as an instrument of change; and, third, a broader set of political transformations that have made feminist understandings of women and law available to jurisprudential practice and to political readings of the place of law in matters of right versus faith, family versus individual, community versus women's rights, and so on. These are at times aligned with, while at others they remain disjunct from, feminist law reform and legal strategy.
In classrooms and seminars, streets and courtrooms alike, in two of India's most tumultuous decades, the relationship between women and the law has been critiqued, redefined, redrawn and generally productively recharged. The massive public participation in the redrafting of the Criminal Law (Amendment) Act of 2013, following national public outrage at the ‘Nirbhaya’ rape of 16 December 2012, renewed memories of the incredible optimism about law and its transformatory capacity in the 1983 amendments to the rape law.
In reflecting on the history of Management and Organization Review (MOR), it is not cliché to say that ‘time flies’. It is amazing that MOR has been in existence for 20 years. The memories of the excitement, challenges, and anxiety in the founding years are still vivid, like yesterday. Most organizations die within 5 years of their birth (Daepp, Hamilton, West, & Bettencourt, 2015; Gürtler & Miller, 2022; SAIC, 2013). We can assume that MOR has passed its survival threat. What accounts for its survival success? Is it luck, as would be the case of some entrepreneurial ventures that came to be at the right time in the right place? Survival was not on the minds of the founders of MOR; making an impact on advancing Chinese management research was. What were the founders' aspirations for creating a new journal in an already highly competitive and mature field of journal publishing in business and management? How well has MOR reached its aspirations? Twenty years is a good occasion to take stock of the achievements of MOR, its challenges and opportunities, and what future does it desire in serving the global community of Chinese management and organization scholars?
How were family forms transformed by the intense focus on the child/woman, the widow and her sexuality? What links did these shifts have to dramatic changes in property ownership, and contests over inheritance of ancestral and self-earned property? How were exceptions to patriarchal/patrilineal descent within families reconstructed? What does case law tell us about whether women stood to gain or lose from changes in family forms?
In August 1936, Muthulakshmi Reddy, member of the AIWC and of the Madras legislature, said in an article entitled ‘A Plea for Marriage Reform’: ‘Marriage at any cost, under any circumstances and at any age has proved a bane to our Hindu community and has produced many undesirable results.’
Reddy's critique of the institution of marriage was important in its timing, coming at the end of a long phase of activity aimed at reforming the structure of the Indian family. Ashwini Tambe usefully tabulates ‘laws affecting the form of the family 1800–1947’ to include both those related to marriage (such as sati abolition, widow remarriage, women's right to property and succession acts) and those not related to marriage (ranging from the criminalization of homosexuality and the abolition of infanticide and the devadasi system, to protectionist measures in factory laws and the Maternity Benefit Acts). In crucial ways, the reforms of the previous century challenged a plurality of conventional kinship networks which were no longer adequate in meeting the demands of an urbanizing, modernizing society under the twin pressures of nascent capitalism and colonialism.
The transformations that affected the family form were not striving towards a preconceived homogeneous ideal. The extraordinary changes effected by colonial rule throughout the 19th century made the material and heteronormative (that is, relations between men and women) foundations of conventional familial relationships more visible but also more unstable, necessitating the recasting of the family. Some of this recasting occurred within the legal-juridical space, making obligations and rights of members of the emerging forms of family enforceable in a court of law, bringing to the foreground one of the principal functions of the family, as a means of transferring property.
The refined person seeks harmony but not sameness; the petty person seeks sameness but does not harmonize.
–Confucius, Analects 13.23
Management and Organization Review (MOR) was launched in 2005 as the journal of the International Association for Chinese Management Research with the mission to ‘promote scholarly studies of organization and management of firms in the Chinese context’. This was an ambiguous message, with at least two distinct meanings. One goal was facilitating research impact by scholars in greater China, who had been largely excluded by the leading management journals. For example, Chinese researchers were often asked to justify using a sample from Shanghai or Hong Kong in ways that their Western counterparts were not asked to justify a sample from London or Chicago. Another goal was to further the management field's understanding of Chinese contexts. The journal sought to open management research to Chinese scholars and open China as a topic for management research.
Glacier ice flux is a key indicator of mass balance; therefore, accurate monitoring of ice dynamics is essential. Satellite-based methods are widely used for glacier velocity measurements but are limited by satellite revisit frequency. This study explores using seismic station internal GPS data to track glacier movement. While less accurate than differential GPS, this method offers high-temporal resolution as a by-product where seismic stations are deployed. Using a seismic station on Borebreen, Svalbard, we show that internal GPS provides reliable surface velocity measurements. When compared with satellite-inferred velocities, the results show a strong correlation, suggesting that the internal GPS, despite its inherent uncertainty, can serve as an efficient tool for glacier velocity monitoring. The high-temporal sampling reveals short-term dynamics of speed-up events and underscores the role of meltwater in driving these processes. This approach augments glacier observation networks at no additional cost.
Photovoltaic (PV) energy grows rapidly and is crucial for the decarbonization of electric systems. However, centralized registries recording the technical characteristics of rooftop PV systems are often missing, making it difficult to monitor this growth accurately. The lack of monitoring could threaten the integration of PV energy into the grid. To avoid this situation, remote sensing of rooftop PV systems using deep learning has emerged as a promising solution. However, existing techniques are not reliable enough to be used by public authorities or transmission system operators (TSOs) to construct up-to-date statistics on the rooftop PV fleet. The lack of reliability comes from deep learning models being sensitive to distribution shifts. This work comprehensively evaluates distribution shifts’ effects on the classification accuracy of deep learning models trained to detect rooftop PV panels on overhead imagery. We construct a benchmark to isolate the sources of distribution shifts and introduce a novel methodology that leverages explainable artificial intelligence (XAI) and decomposition of the input image and model’s decision regarding scales to understand how distribution shifts affect deep learning models. Finally, based on our analysis, we introduce a data augmentation technique designed to improve the robustness of deep learning classifiers under varying acquisition conditions. Our proposed approach outperforms competing methods and can close the gap with more demanding unsupervised domain adaptation methods. We discuss practical recommendations for mapping PV systems using overhead imagery and deep learning models.
To examine the extent and nature of food and non-alcoholic drink advertising displayed on public transport and infrastructure on school routes.
Design:
Audit of outdoor advertisements on government-controlled public transport and associated infrastructure (e.g. tram shelters, bus stops) on busy school routes in Victoria, Australia. Using a strict protocol, trained field workers collected data on the type and content of outdoor advertising during February 2023 (start of school year). Food/drink advertising was classified (unhealthy or healthy) according to the Council of Australian Governments Health Council National interim guide to reduce children’s exposure to unhealthy food and drink promotion (2018).
Setting:
Government-controlled buses, trams and public transport infrastructure on routes from eleven of the busiest train stations in metropolitan Melbourne and regional Victoria, Australia to fifty public primary and secondary schools. Stations were chosen based on annual patronage, area-based socio-economic area (SEA) and regionality).
Results:
156 out of 888 advertisements were for food and non-alcoholic drinks. Of these, almost six in ten (58 %) were deemed unhealthy irrespective of SEA or regionality. Marketing appeals most featured were taste (31 %), convenience (28 %) and emotion (9 %). A significantly higher proportion of unhealthy advertisements were displayed within 500 m of schools v. outside this radius (91 % v. 57 %, P < 0·01).
Conclusion:
Given the detrimental impacts of exposure to unhealthy food/drink advertising on children’s diets, the pervasive, powerful presence of such advertising across government public transport assets, particularly around schools, contradicts public health recommendations to protect children from exposure to and influence by this harmful marketing and warrants government action.
In this work, we studied the broadband temporal and spectral properties of the flat-spectrum radio quasar Ton 599. We collected the long-term data from January 2019 to August 2024 when the source was in a long flaring episode. We used the Bayesian block methodology to identify the various flux states, including three flares. The broadband fractional variability is estimated during two flaring states. The F$_{\text{var}}$ variation with respect to frequency shows a nearly double hump structure similar to broadband SED. The power spectral density shows a pink-noise kind of stochastic variability in the light curve, and we do not see any break in the power spectrum, suggesting a much longer characteristic timescale is involved in gamma-ray variability. The flux distribution is well-fitted with a double log-normal flux distribution, suggesting the variability of non-linear in nature. The gamma-ray, optical, and X-ray emissions were found to be highly correlated with a zero time lag, suggesting a co-spatial origin of their emissions. We used the one-zone leptonic model to reproduce the broadband spectrum in the energy range from the IR to very high-energy gamma rays. The increase in the magnetic field and the Doppler factor were found to be the main causes for high flux states. The XMM-Newton spectra taken during one of the flaring durations exhibit a signature of thermal black body emission from the accretion disc, suggesting a possible disc-jet coupling. This has also been indicated by the gamma-ray flux distribution, which shows the distribution as non-linear in nature, which is mostly seen in galactic X-ray binaries or active galactic nuclei, where the accretion disc dominates the emission.
This study explores an interesting fluid–structure interaction scenario: the flow past a flexible filament fixed at two ends. The dynamic performance of the filament under various inclination angles ($\theta$) was numerically investigated using the immersed boundary method. The motion of the filament in the $\theta$–$Lr$ space was categorised into three flapping modes and two stationary modes, where $Lr$ is the ratio of filament length to the distance between its two ends. The flow fields for each mode and their transitions were introduced. A more in-depth analysis was carried out for flapping at a large angle (FLA mode), which is widely present in the $\theta$–$Lr$ space. The maximum width $W$ of the time-averaged shape of the filament has been shown to strongly correlate with the flapping frequency. After non-dimensionalising based on $W$, the flapping frequency shows little variation across different $Lr$ and $\theta$. Moreover, two types of lift variation process were also identified. Finally, the total lift, drag and lift-to-drag ratio of the system were studied. Short filaments, such as those with $Lr\leqslant 1.5$, were shown to significantly increase lift and the lift-to-drag ratio over a wide range of $\theta$ compared with a rigid plate. Flow field analysis concluded that the increases in pressure difference on both sides of the filament, along with the upper part of the flexible filament having a normal direction closer to the $y$ direction, were the primary reasons for the increase in lift and lift-to-drag ratio. This study can provide some guidance for the potential applications of flexible structures.