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ViRTUE, a virtual reality (VR) hand hygiene trainer, offers users the option of visualizing pathogen transfers during virtual patient care either in “real-time” or at the end of a level as a “summary” visualization. In this study, we aimed to evaluate the effect of different timings of pathogen visualization (“real-time” vs “summary”) on in-trainer performance and user’s immersion.
Methods:
The study included first-year medical students undergoing hand hygiene training with ViRTUE, randomized to one of three visualization set-ups: set-up 1 (“on-off-off”, with “real-time” visualization at the first level only, and “summary” visualization at level 2 and 3), set-up 2 (“off-on-off”), and set-up 3 (“off-off-off”). In-trainer performance was defined by number of pathogen transmission events (=contaminations) in level 3. The virtual experience of user’s (among others: immersion) was assessed with a questionnaire.
Results:
173 medical students participated in the study, with 58, 54, and 61 assigned to set-up 1, set-up 2, and set-up 3, respectively. Users assigned to set-up 3 with “summary” visualization at all levels, performed best with 1.02 (standard deviation (SD) +/- 1.86) contaminations, compared to 2.34 (SD +/- 3.09) and 2.07 (SD +/- 2.52) contaminations of users assigned to the other set-ups. “Summary” visualization at all levels also resulted in higher immersion of users.
Conclusions:
“Real-time” visualization of pathogen transmission during VR hand hygiene training with ViRTUE may negatively affect in-trainer performance and user immersion. This emphasizes the importance of pilot testing the effect of VR-based trainings in order to understand their impact on users.
In this article, I present the freedom narratives of the diverse enslaved Africans who were liberated from barracoons and captured slave vessels and resettled at Regent Village on the Sierra Leone peninsula in the nineteenth century. Following the British abolition of the Atlantic Slave Trade in 1807, the British Royal Navy patrolled the West Atlantic Sea and redirected illegal slave vessels to Sierra Leone, where the Vice-Admiralty Court (which became the Mixed Commissions in 1820) would set them free from slavery. While legally free from bondage, liberated Africans became colonial subjects living in a nascent British colony. What can historical archaeology reveal about the history of freedom among diasporic ethnic identities at Regent Village? I answer this broad question by drawing on historical and archaeological data to demonstrate how people navigated and transformed the village landscape, as well as the decisions and choices they made at the household level, focusing on selected two house loci, which serve as a case study. I concentrate mainly on the identities, experiences, and historical narratives of liberated Africans in the village and extend the discussion to the lives of their descendants who continue to negotiate issues of power and control in contemporary Sierra Leone.
In transdisciplinary sustainability, scientists take responsibility for the long-term impact they have on practitioners in the research field and beyond. However, the duration of a career and amounts of funding are finite. One way out is to perform a responsible exit from the field. This study extracts lessons to realizing researchers’ responsible exit from their field through detailed description of the experiences of two researchers and a practitioner in collaboration in transdisciplinary research, weaving together the perspectives of all parties. The following lessons were extracted: (1) Imagining the extent of mutual understanding, (2) Production of knowledge entrusted to practitioners, and (3) Researchers’ acceptance of being unneeded. This study does not claim that these approaches are universally effective. We suggest that the reader transfer this case study and its approaches to his or her own case to seek better relationships. The validity of this qualitative study's suggestions should be tested by readers.
Non-Technical Summary
In the discipline of transdisciplinary sustainability, researchers must responsibly manage their impact on their partner practitioners. Balancing this with limited career durations and limited research funds is challenging. One potential solution involves responsibly exiting from the research field. This study investigates the experience of two researchers and a practitioner in collaborative transdisciplinary research. The lessons include acknowledging researchers’ amateurism, anticipating the challenges in achieving mutual understanding, and embracing researchers’ acceptance of feeling unneeded. The universality of these principles should be investigated in the future research. This research encourages readers to apply these principles to their own cases to develop better relationship between researchers and practitioners that leave no seeds of misfortune.
Technical Summary
In transdisciplinary sustainability, scientists take responsibility for the long-term impact they have on practitioners in the research field and broader communities. However, the duration of a career as a scientist and amounts of funding are finite. One way out is to responsibly exit from the field. This study extracts lessons to realizing researchers’ responsible exit from their field by providing a detailed account of the collaborative experiences of two researchers and a practitioner engaged in transdisciplinary research, weaving together the perspectives of all parties. The following lessons were extracted: acknowledging researchers’ amateurism, anticipating the challenges in achieving mutual understanding, and embracing researchers’ acceptance of feeling unneeded. This study does not claim that these principles are universally effective. We suggest that the reader transfer this case study and its approaches to his or her own case to seek better relationships.
Social Media Summary
In transdisciplinary sustainability, researchers must responsibly manage their impact on their research partner practitioners. Balancing this with limited career durations and funds is challenging. Researchers’ responsible exit from the research field is a possible solution. This research derives insight from researchers’ and a practitioner's experiences in collaborative transdisciplinary research. Lessons include acknowledging researchers’ amateurism, anticipating the challenges in achieving mutual understanding, and embracing researchers’ acceptance of feeling unneeded. However, these approaches might not be universal. Readers are encouraged to apply these lessons to their own case for better relationship building.
Verse epitaphs are our main and very abundant source for responses to individual deaths. We can almost never know exactly whose attitudes or values they express, but we can assume that they embody attitudes and values that it was acceptable to express publicly. Many at all dates seek merely to commemorate the dead person or convey grief, but, from about 400 bce onwards, others adopt a position on the fate of the dead person, though often hedged with a cautious ‘if’. Very many possibilities emerge: they range from a plain denial that anything survives death, via claims that the dead person is now (e.g.) in the aither/in the home of the blessed/on Olympos/with the heroes, to, very rarely, declarations that s/he is now actually a god. Strangely enough, support for such claims is never sought in the fact of the dead person being an initiate in a cult that promised advantage in the afterlife. In all this we see not so much individual choices as the range of options available for individuals to believe in. But we must also suspect that belief in the more optimistic options can seldom have been as firm as in a society where such options were authoritatively endorsed and alternatives not publicly countenanced.
This article presents the theoretical foundations of speculative archaeoacoustics, a methodology of composition in which artistic practice becomes a way of accessing the lost music of the Upper Palaeolithic. It begins by accepting David Graeber and David Wengrow’s understanding of prehistory as a dazzling tapestry of investigations and enquiries, before drawing a methodology of affect and creation from the work of Steven Mithen. From here it critiques two contemporary procedures for realising ancient music – one theoretical and one practical – to show how lost art must be reclaimed not through the empirical limit but the aesthetic exception. By adapting Alain Badiou's theory of eternal, invariant truths through a satirical tradition that includes science- and theory-fiction, the argument concludes with the demonstration of a procedure through which we may reimagine, discover and speak for vanished genius.
In this study, we analyse ‘magneto-Stokes’ flow, a fundamental magnetohydrodynamic (MHD) flow that shares the cylindrical-annular geometry of the Taylor–Couette cell but uses applied electromagnetic forces to circulate a free-surface layer of electrolyte at low Reynolds numbers. The first complete, analytical solution for time-dependent magneto-Stokes flow is presented and validated with coupled laboratory and numerical experiments. Three regimes are distinguished (shallow-layer, transitional and deep-layer flow regimes), and their influence on the efficiency of microscale mixing is clarified. The solution in the shallow-layer limit belongs to a newly identified class of MHD potential flows, and thus induces mixing without the aid of axial vorticity. We show that these shallow-layer magneto-Stokes flows can still augment mixing in distinct Taylor dispersion and advection-dominated mixing regimes. The existence of enhanced mixing across all three distinguished flow regimes is predicted by asymptotic scaling laws and supported by three-dimensional numerical simulations. Mixing enhancement is initiated with the least electromagnetic forcing in channels with order-unity depth-to-gap-width ratios. If the strength of the electromagnetic forcing is not a constraint, then shallow-layer flows can still yield the shortest mixing times in the advection-dominated limit. Our robust description of momentum evolution and mixing of passive tracers makes the annular magneto-Stokes system fit for use as an MHD reference flow.
This article discusses the United Kingdom Supreme Court judgment in Zubaydah v Foreign, Commonwealth and Development Office, which addressed the law governing the tort liability of the United Kingdom Government for its alleged complicity in the claimant's arbitrary detention and torture overseas by the Central Intelligence Agency. In holding that English law applied, the Court departed from previous case law by giving decisive weight to public law factors in its choice-of-law reasoning. This decision arguably heralds a greater role for English law in relation to tort claims brought by overseas victims of allegedly wrongful exercises of British executive authority as a mechanism for achieving executive accountability, controlling abuse of power, ensuring the rule of law and providing victims access to remedy.
Sicklepod is one of the most difficult to control weeds in peanut production in the southeastern United States due to its extended emergence pattern and limited effective herbicides for control. Growers rely on preemergence herbicides as the foundation of their weed control programs; however, postemergence herbicides are often needed for season-long weed control. The objectives of this study were to evaluate the effect of planting pattern and herbicide combinations for sicklepod control in peanut crops. Due to rapid canopy closure, twin-row planting improved late-season sicklepod control by 13% and peanut yield by 5% compared with a single-row pattern. A preemergence application of fluridone, flumioxazin, or fluridone + flumioxazin provided 76% to 89% control of sicklepod 28 d after preemergence. Regardless of the herbicide applied preemergence, paraquat + bentazon + S-metolachlor applied early postemergence was required to achieve ≥90% sicklepod control 28 d after early postemergence. All preemergence herbicide treatments followed by (fb) S-metolachlor or diclosulam + S-metolachlor applied early postemergence provided <90% control 28 d after early postemergence. A mid-postemergence application of imazapic + dimethenamid-P + 2,4-DB controlled sicklepod by 67% to 79% prior to peanut harvest, and biomass reduction was unacceptable (<80%), resulting in difficulty in peanut digging. The highest peanut yield was observed when paraquat + bentazon + S-metolachlor was applied early postemergence fb imazapic + dimethenamid-P + 2,4-DB applied mid-postemergence. Based on the results of this study, a herbicide combination of paraquat + bentazon + S-metolachlor is an important early-season tool for controlling sicklepod in peanut crops. The results also showed that a twin-row planting pattern improved late-season sicklepod control but did not reduce herbicide input to protect peanut yield.
This essay assesses the morality of Ukraine's use of drones to attack targets inside Russia. Following its invasion by Russian forces, Ukraine has had a just cause to wage a war of self-defense. However, its efforts to achieve that cause remain subject to moral limits. Even a state that has been unjustly attacked may not, for example, respond by deliberately targeting the attacking state's civilian population. To do so would violate the jus in bello principle of discrimination. The essay first describes how drone technology has frequently enabled long-range strikes against Russian military assets as well as other targets inside cities. It then explains why it would be morally wrong for Ukraine to attack its enemy's population centers. First, Russian civilians are not liable to attack, and this nonliability is undiminished by the injustice of Russia's invasion or by any in bello wrongs committed by the Russian military. Second, attacking Russian cities with drones would arguably achieve little or no self-defensive benefit for Ukraine, and it could even be counterproductive.
On November 9, 2023, Prime Minister Albanese of Australia and then Prime Minister Natano of Tuvalu signed the Australia-Tuvalu Falepili Union Treaty in Rarotonga (Falepili Union Treaty or the Treaty). The preamble explains that “the concept of Falepili . . . connotes the traditional values of good neighbourliness, duty of care and mutual respect.” It sets a groundbreaking precedent for Small Island States threatened by rising sea-levels, addressing both State continuity and climate resettlement. Nonetheless, and despite its subsequent entry into force on August 28, 2024, it has not been without controversy in Tuvalu and, to a lesser extent, Australia due to provisions seen by some as substantially infringing Tuvalu's independence in foreign relations or even its sovereignty.
Cremated bones are a commonly preserved material and often found in burial environments where unburned bone may not be preserved. As such direct radiocarbon dating of cremated bone could be essential in determining the chronology of an event. Pretreatment of cremated bone exploits the structural carbonate component of the bone which survives cremation. However, due to the low abundance (ca. 0.1%) of this component, the extraction of an amount of endogenous carbon sufficient for radiocarbon dating may represent a challenge. Here we investigate two modifications to the phosphoric acid digestion protocol used during the preparation of cremated bones at the Oxford Radiocarbon Accelerator Unit (ORAU). The first of these was to use ultrasonication to release evolved CO2 from the viscous phosphoric acid and cremated bone mixture that is formed during digestion. The second was to double the amount of time during which evolved CO2 was removed from the reaction vessel by transfer into a cryogenically cooled ampoule. Ultrasonication of the digestion mixture failed to produce a significantly higher carbon yield, while double-time collection resulted in an average 21.5±13.8% increase of C yield without affecting the measured age. Extending the collection time can better enable reliable dating of small (less than 1 g) samples.
The Society of Antiquaries of London holds, under ms 86, an unconventional manuscript described in its catalogue as ‘brief notes on the Kings of Portugal’. The manuscript is in a mid-sixteenth-century hand and has personal annotations by William Cecil (1520–98), better known as Lord Burghley. It recounts the history of Portugal by reigns and belonged to Cecil’s personal library. Until now, no other extant example of a history of Portugal written in English in the sixteenth century was known. This article publishes the first transcription of this unique document, while analysing its contents and explaining its importance. The first section will discuss the history of the manuscript itself, explaining its owners, its likely date of composition and the problems relating to authorship. The second part will deal with the raft of reasons why we believe William Cecil ordered its composition. The third section will detail the major contents of the manuscript, discussing its most interesting details. Finally, the conclusion will reflect on why this manuscript is important for British history.
Toward the end of the first millennium ad, a burgeoning class of secular elites emerged throughout western Europe who developed local power centres to denote their prestige. Seigneurial investment was prioritised towards residences, as well as churches and chapels, the two elements often paired into single places in the landscape. In England, our understanding of these complexes is limited due to scant excavated evidence and skewed by the impact of the Norman Conquest, after which castles became the dominant form of aristocratic site. Previous approaches have often fetishised defensibility and promoted notions of national exceptionalism, but a more meaningful understanding of these places can be gained by adopting a broad chronological and thematic remit. Drawing upon the results of the AHRC-funded research project ‘Where Power Lies’, this paper offers a foundational evaluation of the landscape evidence for lordly centres, presenting data on their distribution in two regions, complemented by results from intensive investigation of case study locations (Bosham, West Sussex and Hornby, North Yorkshire). This allows a wider range of material signatures from lordly centres to be characterised, resulting in greater comprehension of how elites in England shaped and experienced a Europe-wide phenomenon.
Can you have true beliefs about the future? Obviously it would be a good thing if you could. If you have true beliefs about the future then you can make plans and things will turn out as you expect. But many people – including philosophers – think that beliefs about the future cannot be true. The thought might be this: a belief cannot be true if there is nothing for it to be true about, and since the future does not yet exist, beliefs about the future cannot be true. I argue that this view depends on treating beliefs in the abstract. Once we look at them in their conversational context we will see how beliefs about the future can be true. Given the value of having true beliefs about the future – especially the near future – we should have no qualms pursuing them.
This article discusses the relationship between particular and general customary international law, grappling with academic views affirming that, ordinarily, the emergence of the former is a stage in the consolidation of the latter. It is argued that the higher standard of State consent required for the configuration of bilateral or regional custom suggests otherwise. In addition, it is also contended that a distinctive kind of opinio juris must be present for particular custom to arise: a conviction from the States concerned that their conduct is governed by particular (as opposed to general) customary law.
This study aims to assess the correlation between NAA (N-acetyl-l-aspartate), CHO (choline), and CRE (creatine) levels in the hippocampus regions of individuals suffering from obsessive-compulsive disorder (OCD) and defensive styles of the ego.
The study group was composed of twenty patients with OCD and twenty healthy controls. NAA, CHO, and CRE values in the hippocampal region using proton magnetic resonance spectroscopy (1H-MRS) were measured. Participants’ defense styles were ascertained by administering the Defense Style Questionnaire-40.
The patient group’s NAA levels were considerably lower than the control group’s on both sides of the hippocampus. The levels of CHO and CRE did not significantly differ between the two groups. The following statistically significant correlations were discovered: in the comparison group, there were negative correlations between the scores of mature defense styles and the right and left CHO levels, as well as between the immature defense mechanism scores and the right NAA levels in both the patient and control groups. In the patient group, there were also negative correlations between the left NAA values and the scores of mature defense styles.
OCD patients have lower levels of NAA in the hippocampus. To validate and extend the current findings, more research involving a greater sample size is required.
Herbicides that inhibit 4-hydroxyphenylpyruvate dioxygenase (HPPD) can be mixed with herbicides that generate reactive oxygen species (ROS) to enhance the spectrum, level, speed, and consistency of weed control efficacy; however, mixtures of these herbicides can increase corn injury. A total of five field trials were conducted from 2021 to 2023 in Ridgetown, Ontario, to determine the sensitivity of two corn hybrids (‘DKC39-97’ and ‘B79N56PWE’) to tolpyralate plus ROS-generating herbicides (atrazine, bromoxynil, bentazon, or glufosinate) applied postemergence at the recommended rate (1×) and sequentially to represent a spray overlap (2×) in the field. Tolpyralate plus atrazine, bromoxynil, bentazon, or glufosinate (2× rates) caused greater corn injury to DKC39-97 than B79N56PWE corn at 1, 2, and 4 wk after treatment (WAT). Tolpyralate plus atrazine, bromoxynil, bentazon, or glufosinate (2× rates) caused 38%, 36%, 29%, and 18% injury to DKC39-97 corn, but only 5%, 20%, 9%, and 2% injury to B79N56PWE corn, respectively at 1 WAT. Corn injury to both hybrids decreased over time with ≤2% injury at 8 WAT. Tolpyralate + atrazine, bromoxynil, or bentazon (2× rates) caused a 17%, 16%, and 13% height reduction, respectively, of DKC39-97 corn at 2 WAT; however, tolpyralate + glufosinate did not reduce DKC39-97 corn height. Tolpyralate + bromoxynil or bentazon (2× rates) caused a 12% and 10% height reduction of B79N56PWE corn, respectively, at 2 WAT; however, tolpyralate + atrazine or glufosinate did not reduce B79N56PWE corn height. Tolpyralate + atrazine or glufosinate (2× rates) caused a greater corn height reduction of DKC39-97 corn than B79N56PWE corn at 2 WAT. Grain yield was on average 2% lower from DKC39-97 than B79N56PWE corn. Tolpyralate + bromoxynil or bentazon (2× rates) caused 7% and 6% corn grain yield reduction compared to tolpyralate plus glufosinate (2× rate). Results indicate that tolpyralate + ROS-generating herbicides can cause corn injury, which is influenced by corn hybrid and ROS-generating herbicide. Corn producers need to consider the differential sensitivity of corn hybrids and ROS-generating herbicides when using an HPPD-inhibiting herbicide for weed management.
This article argues that the purpose of the English gateways for service out of the jurisdiction is to identify a presumptive meaningful connection; that courts have used different mechanisms to rebut the presumption of a meaningful connection established by the gateways; and that there are lessons to be learnt from a clearer, more explicit understanding of this presumptive purpose of the gateways. The article uses Brownlie (I and II) and Fong v Ascentic Ltd to support and illustrate these arguments.
The question of whether the divine commandments were observed prior to the revelation at Sinai has vast theological and hermeneutical implications. The first known systematic account that has reached us on the question of the antiquity of the commandments is found in the tenth-century Karaite scholar Yaʿqūb al-Qirqisānī’s Kitāb al-Anwār w-al-Marāqib. Qirqisānī discusses two theories: according to the first, the divine commandments were given already to Adam; and according to the second, God’s law was given in an accumulative process, the Torah being developed in accordance with the historical circumstances. This article analyzes the two theories and demonstrates that they are rooted in a Muslim-Jewish debate, conducted in the first half of the ninth century, about the Muslim principle of abrogation (naskh), and that the historical context of the argument on the subject probably was that of the interreligious debates that took place in Qirqisānī’s time.