The National Archives of Tanzania (Idara ya Kumbukumbu za Taifa la Tanzania) were established on 28 August 1965. Since this date energies have been directed toward building an efficient archival service: better storage facilities have been acquired, trained Tanzanian personnel have been hired, and there is now seating space for ten researchers. The most significant development from the historian's point of view has been the recent organization of the German records into a concise and convenient index catalogue.

In June 1967 the West German Government Technical Aid Program sent Mr. Peter Geissler, an Archivinspektor at Hessiches Staatsarchiv, Marburg, on a two-year project to reorganize the German records. Mr. Geissler is already familiar to historians of the American Revolution for his research on the Hessian troop records at Marburg. In Deutsch-Ostafrika the old German Registry System (renewed in 1902 and in effect until 1916) had been utilized in numbering the various files. A still extant two-volume Registry lists all the documents in existence before the First World War, but many of these have since been lost, eaten by white ants, stolen, or destroyed. It is evident that only a few records concerning district political administration have survived, while land, legal, mission, public works, and education files are among the most complete. The files have been divided into two main groupings: (1) the old German Registry and other German Government Administration (G 1 - G 65); and (2) Private Archives (G 66 - G 86). Each file card contains both the new “G” number and the old German Registry designation. In addition Mr. Geissler has performed a painstaking task in listing on each card some of the outstanding names, places, etc. mentioned in the particular file.

Quantum interactions exchanging different types of particles play a pivotal rôle in quantum many-body theory, but they are not sufficiently investigated from a mathematical perspective. Here, we consider a system made of two fermions and one boson, in order to study the effect of such an off-diagonal interaction term, having in mind the physics of cuprate superconductors. Additionally, our model also includes a generalized Hubbard interaction (i.e., a general local repulsion term for the fermions). Regarding pairing, exponentially localized dressed bound fermion pairs are shown to exist, and their effective dispersion relation is studied in detail. Scattering properties of the system are derived for two channels: the unbound and bound pair channels. We give particular attention to the regime of very large on-site (Hubbard) repulsions because this situation is relevant for cuprate superconductors.

Antenatal corticosteroids are given to pregnant people at risk of preterm birth to reduce newborn morbidity, including respiratory distress syndrome. However, there has been concern surrounding potential adverse effects on subsequent generations. Animal studies have demonstrated endocrine and metabolic changes in those exposed to corticosteroids in utero (F1) and in the second generation (F2). We aimed to assess the effects of parental antenatal corticosteroid exposure on health of the second generation (F2) of Auckland Steroid Trial (AST) participants. In the AST, women (F0) expected to birth between 24 and 36 weeks’ gestation were randomised to betamethasone or placebo. When their children (F1) were 50 years old, they and their children (F2) were followed up with a self-report questionnaire and data linkage. The primary outcome for this analysis was body mass index (BMI) z-score in the F2 generation. Secondary outcomes included respiratory, cardiovascular, neurodevelopmental, mental and general health, and social outcomes. Of the 213 F2 participants, 144 had BMI data available. There was no difference in BMI z-score between participants whose parent was exposed to betamethasone versus placebo (mean (SD) 0.63 (1.45), N = 77 vs 0.41 (1.28), N = 67, adjusted mean difference (95% confidence interval) = 0.16 (-0.37, 0.69)). There was no evidence of a difference in rates of overweight, diabetes, respiratory disease, cardiometabolic risk factors, neurodevelopmental difficulties, mental health difficulties and social outcomes between parental betamethasone versus placebo exposure groups, but confidence intervals were wide. These findings are reassuring regarding the intergenerational safety of antenatal corticosteroids.

The Corn Belt is famously responsible for the bulk of U.S. corn production, and over half of its production comes from counties that rely on artificial drainage. We trace the history of this extensive investment in farmland and document the importance of a key institutional innovation, the drainage management district, which increased the land value of naturally wet eastern U.S. counties by 20–37 percent ($16.8–18.7 billion in 2020 dollars). While dramatically increasing agricultural productivity, drainage converted more than half of the 215 million acres of wetlands estimated to have existed in the United States at the time of colonization to agriculture.

The Bray–Liebhafsky reaction is one of many intricate chemical systems that is known to exhibit periodic behaviour. Although the underlying chemistry is somewhat complicated and involves at least ten chemical species, in a recent work we suggested a reduced two-component model of the reaction involving the concentrations of iodine and iodous acid. Although it is drastically simplified, this reduced system retains enough structure so as to exhibit many of the oscillatory characteristics seen in experimental analyses. Here, we consider the possibility of spatial patterning in a nonuniformly mixed solution. Since many practical demonstrations of chemical oscillations are undertaken using circular containers such as beakers or Petri dishes, we develop both linearized and nonlinear pattern solutions in terms of cylindrical coordinates. These results are complemented by an analysis of the patterning that might be possible within a rectangular domain. The simulations give compelling evidence that spatial patterning may well be feasible in the Bray–Liebhafsky process.

This study investigated surface energy fluxes of the Huayna-Potosí Glacier in Bolivia to validate existing empirical melt estimates, including degree-day models and enhanced temperature-index models. A multilayer energy balance model of the snowpack was employed to estimate melt energy and analyze its correlation with meteorological variables. The energy balance analysis revealed that melt energy peaked in October and November, the period corresponding to the progressive development toward the core wet season. Most of the net radiation was consumed by the conductive heat flux into the snowpack or glacier ice, contributing to surface temperature increases. The remaining energy was used for melt. An analysis of diurnal variation indicated that atmospheric longwave radiation suppresses melt during the dry season while driving melt during the wet season. Variables such as specific humidity and relative humidity, which are related to atmospheric longwave radiation, emerged as primary controlling factors after solar radiation in estimating melt based on meteorological variables. This study highlights that a combination of solar radiation and specific humidity outperforms existing empirical melt models that depend exclusively on temperature or a combination of temperature and solar radiation.

Aims: Electroconvulsive therapy (ECT) is an effective treatment modality used to manage a variety of different psychiatric conditions including treatment-resistant schizophrenia, depression and catatonia. Different teaching methods have been employed by educational institutions to teach healthcare students about ECT, however synthesis of this evidence is lacking. Several sources cite that there is negative stigma and attitudes towards ECT amongst Healthcare Professionals (HCPs). Teaching within undergraduate curricula may improve knowledge surrounding ECT, further reducing negative associations.

Methods: Using pre-determined search terms, a large language model was used to screen relevant databases (including ERIC and CINAHL), identifying 5,550 studies, 453 of which were duplications, leading to a total of 5,097 relevant studies. Pre-agreed strict inclusion and exclusion criteria were applied, and 19 studies were identified suitable for inclusion. Another 14 studies were reviewed again due to conflicting views, of which 7 were deemed suitable, totalling 26 relevant studies for inclusion. These texts were analysed in their entirety. Both qualitative and quantitative data was gathered, and this was heterogenous in nature. Qualitative data was thematically analysed.

Results: Diverse teaching techniques and interventions were identified, and these were successful to varying degrees. These interventions included: the development and creation of new educational modules centred around ECT; real time ECT demonstrations; teaching sessions paired with specialised technology enhanced learning interventions hosted remotely by consultant psychiatrists. A plethora of different interventions centred around improving knowledge of ECT amongst healthcare students varied in creativity, and even included a Hollywood depiction of ECT.

Educational interventions focusing on the improvement of students’ experience whilst on psychiatric placements correlated with a global positive improvement in knowledge levels regarding ECT. Video-based educational interventions were well received by students, and an improvement in attitude and knowledge regarding ECT was noted. Passive interventions, including didactic based teaching interventions described a notable positive shift in attitudes amongst students regarding ECT. However, some studies reported that the longevity of this improvement in knowledge and attitudes may be short-lived, affecting its translation to future medical practice.

Conclusion: This systematic review highlights the need to improve education of ECT amongst healthcare students, to ensure that future clinicians are well equipped with relevant knowledge concerning this important treatment modality. Ultimately interventions that strive to improve knowledge of ECT and induce positive experiences with students, helps to reshape attitudes towards this treatment modality and future clinical practice.

Intensive longitudinal data (ILD) collected in mobile health (mHealth) studies contain rich information on the dynamics of multiple outcomes measured frequently over time. Motivated by an mHealth study in which participants self-report the intensity of many emotions multiple times per day, we describe a dynamic factor model that summarizes ILD as a low-dimensional, interpretable latent process. This model consists of (i) a measurement submodel—a factor model—that summarizes the multivariate longitudinal outcome as lower-dimensional latent variables and (ii) a structural submodel—an Ornstein–Uhlenbeck (OU) stochastic process—that captures the dynamics of the multivariate latent process in continuous time. We derive a closed-form likelihood for the marginal distribution of the outcome and the computationally-simpler sparse precision matrix for the OU process. We propose a block coordinate descent algorithm for estimation and use simulation studies to show that it has good statistical properties with ILD. Then, we use our method to analyze data from the mHealth study. We summarize the dynamics of 18 emotions using models with one, two, and three time-varying latent factors, which correspond to different behavioral science theories of emotions. We demonstrate how results can be interpreted to help improve behavioral science theories of momentary emotions, latent psychological states, and their dynamics.