The use of standard electrode potentials to predict the taste of solid metals

Not all metals taste equally metallic when placed in the mouth. While much work has been done to examine the metallic taste sensations arising from metal ions in solutions, there is comparatively less known about the taste of solid metals. In this study seven metals in the form of spoons were used to compare the perception of taste arising from solid utensils placed inside the mouth. 32 participants tasted seven spoons of identical dimensions plated with each of the following metals: gold, silver, zinc, copper, tin, chrome and stainless steel. More negative standard electrode potentials were found to be good predictors of solid metals that had tastes scoring highest for the taste descriptors strong, bitter, and metallic. Thus, it was found that both gold and chrome (having the most positive standard electrode potentials) were considered the least metallic, least bitter and least strong tasting of the spoons. Zinc and copper (having the most negative standard electrode potentials) were the strongest, most metallic, most bitter, and least sweet tasting of the spoons. We conclude that gold and chrome have tastes that are less strong than metals with lower standard electrode potential

From Surviving to Thriving: Evaluation of the International Diabetes Federation Life for a Child Program

IDF-LFAC aims to provide: (1) insulin and syringes; (2) blood glucose monitoring (BGM) equipment; (3) appropriate clinical care; (4) HbA1c testing; (5) diabetes education; and (6) technical support and training for health professionals, as well as 7) facilitating relevant clinical research, and where possible 8) assisting with capacity building. IDF-LFAC receives financial and in-kind support from private foundations, individuals, and corporations. Insulin and blood glucose monitoring equipment distribution is made possible by donations of insulin and the purchase of blood glucose monitors and strips at a reduced price from large pharmaceutical companies.The goal of this evaluation is to assess IDF-LFAC's organizational structure, strategic framework, processes, program impact, and potential to catalyze longterm sustainable improvements to T1D care delivery systems in its partner countries. LSHTM were commissioned to undertake the evaluation in 2014 when IDF-LFAC had active programs in 45 countries

Coherent Microwave Control of Ultracold 23^{23}Na40^{40}K Molecules

We demonstrate coherent microwave control of rotational and hyperfine states of trapped, ultracold, and chemically stable $^{23}$Na$^{40}$K molecules. Starting with all molecules in the absolute rovibrational and hyperfine ground state, we study rotational transitions in combined magnetic and electric fields and explain the rich hyperfine structure. Following the transfer of the entire molecular ensemble into a single hyperfine level of the first rotationally excited state, $J{=}1$, we observe collisional lifetimes of more than $3\, \rm s$, comparable to those in the rovibrational ground state, $J{=}0$. Long-lived ensembles and full quantum state control are prerequisites for the use of ultracold molecules in quantum simulation, precision measurements and quantum information processing.Comment: 5 pages, 4 figure

Does growth in private schooling contribute to Education for All? Evidence from a longitudinal, two cohort study in Andhra Pradesh, India

This paper informs debates about the potential role for low-fee private schooling in achieving Education for All goals in India. It reports ‘Young Lives’ longitudinal data for two cohorts (2,906 children) in the state of Andhra Pradesh. Eight year olds uptake of private schooling increased from 24 per cent (children born in 1994-5) to 44 per cent (children born in 2001-2). Children from rural areas, lower socioeconomic backgrounds and girls continue to be under represented. While some access gaps decreased, the gender gap seems to be widening. Evidence on risks to equity strengthen the case for an effectively regulated private sector, along with reforms to government sector schools

What Can The Matter Be?

'What can the matter be' is the title of an audio guide of selected works in the Tate Modern collection in which the matter of the artwork is forefronted and questioned. The designed tour is produced in MP3 format and selections are downloadable by the public from the Tate Modern website onto their private MP3 players prior to visiting the museum. The audio guide/tours were produced in partnership with the Education team at the Tate Modern

Goats Follow Human Pointing Gestures in an Object Choice Task

Dogs (Canis lupus familiaris) are extremely adept in interpreting human-given cues, such as the pointing gesture. However, the underlying mechanisms on how domestic non-companion species use these cues are not well understood. We investigated the use of human-given pointing gestures by goats (Capra hircus) in an object choice task, where an experimenter surreptitiously hid food in one of two buckets. Subjects first had to pass a pre-test where the experimenter indicated the location of the food to the subject by a proximal pointing gesture. Subjects that succeeded in the use of this gesture were transferred to the actual test. In these subsequent test trials, the experimenter indicated the location of the food to the subject by using three different pointing gestures: proximal pointing from a middle position (distance between target and index finger: 30 cm), crossed pointing from the middle position (distance between target and index finger: 40 cm), asymmetric pointing from the position of the non-baited bucket (distance between target and index finger: 90 cm). Goats succeeded in the pointing gestures that presented an element of proximity (proximal and crossed) compared to when the experimenter was further away from the rewarded location (asymmetric). This indicates that goats can generalize their use of the human pointing gesture but might rely on stimulus/local enhancement rather than referential information. In addition, goats did not improve their responses over time, indicating that no learning took place. The results provide a greater understanding of human-animal interactions and social-cognitive abilities of farm animals, which allows for the provision of enhanced management practices and welfare conditions.© 2020, The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/ </p

Lunar far-side radio arrays: a preliminary site survey

The origin and evolution of structure in the Universe could be studied in the Dark Ages. The highly redshifted H I signal between 30 30 MHz. To observe the low-frequency window with research from compact steep spectrum sources, pulsars, and solar activity, a 200 km baseline lunar far-side radio interferometer has been much discussed. This paper conducts a preliminary site survey of potential far-side craters, which are few in number on the mountainous lunar far-side. Based on LRO LOLA data, 200 m resolution topographic maps of eight far-side sites were produced, and slope and roughness maps were derived from them. A figure of merit was created to determine the optimum site. Three sites are identified as promising. There is a need to protect these sites for astronomy

What personal and environmental factors determine frequency of urban greenspace use?

For many people, urban greenspaces are the only places where they encounter the natural world. This is concerning as there is growing evidence demonstrating that human well-being is enhanced by exposure to nature. There is, therefore, a compelling argument to increase how frequently people use urban greenspaces. This may be achieved in two complementary ways by encouraging: (I) non-users to start visiting urban greenspaces; (II) existing users to visit more often. Here we examine the factors that influence frequency of greenspace visitation in the city of Sheffield, England. We demonstrate that people who visit a site least frequently state lower self-reported psychological well-being. We hypothesised that a combination of socio-demographic characteristics of the participants, and the biophysical attributes of the greenspaces that they were visiting, would be important in influencing visit frequency. However, socio-demographic characteristics (income, age, gender) were not found to be predictors. In contrast, some biophysical attributes of greenspaces were significantly related to use frequency. Frequent use was more likely when the time taken to reach a greenspace was shorter and for sites with a higher index of greenspace neglect, but were unrelated to tree cover or bird species richness. We related these results to the motivations that people provide for their visits. Infrequent users were more likely to state motivations associated with the quality of the space, while frequent users gave motivations pertaining to physical, repeated activities. This suggests that there may be no simple way to manage greenspaces to maximise their use across user cohorts as the motivations for visits are very different