Vegetable crop production In communal areas in Mashonaland: results of a survey in 1988

A research paper on vegetable crop production in rural ZimbabweA survey of horticultural crop production in Zimbabwe was carried out in 1988 in order to provide information relevant to the development of a strategy for horticultural research. This was needed in view of the obviously great potential for expansion of horticulture and the shortage, especially, of useful data on then-current production by communal area and other smallholder farmers. The data obtained was used in research planning but not hitherto published in any widely available formCIIFAD provided the funding for the workshop and for publication of these proceedings

Event sponsorship by alcoholic and non-alcoholic drinks businesses in India

Purpose – This paper aims to examine event sponsorship decision making by the Indian drinks industry, comparing the non-alcoholic and alcoholic drinks sectors. Design/methodology/approach – Data regarding event sponsorship activity, perceptions of event sponsorship, motives to sponsor, form of investment and structure of sponsorship was obtained from a sample of 61 drinks producers in India through a questionnaire. Mann-Whitney and logistic regression were employed to compare the alcoholic and the non-alcoholic sectors. Findings – The results suggest that the alcohol and non-alcohol drinks sectors sponsored a similar level of events, but in investment volume terms, sponsorship from the non-alcoholic sector is far greater than that of the alcoholic sector. While the two sectors are similar in many ways, the emphasis placed on certain motives for sponsoring events was different, with alcoholic drinks businesses placing greater importance on reaching niche audiences and increasing media coverage than non-alcoholic ones. Research limitations/implications – A limited number of areas of the sponsorship decision-making were covered, yet the study provides insights into the decision making of one of the key sponsoring industries: the drinks industry. Practical implications – Securing sponsorship is becoming more difficult and complex. By understanding how sponsors make decisions, including potential variations between companies within an industry, event organisers will be in a better position to tailor sponsorship proposals, enhancing the likelihood of obtaining the desired sponsorship contracts. Originality/value – Most sponsor decision-making research focuses on how sponsorship decisions can be improved so that they work better for the sponsor. This paper, in contrast, emphasises that by understanding how clients make decisions (i.e. sponsors), sellers (i.e. the sponsored) will be in a better position to win over competition and secure the desired sponsorship deals

Low Probability Events and Determining Acceptable Risk: The Case of Nuclear Regulation

This paper discusses two aspects of the problem of determining and managing risk policies for low probability events. The public choice problem concerns the difficulty of defining acceptable societal risk when there is considerable individual disagreement about acceptable risk. The information processing problem addresses how individuals and organizations perceive and make decisions about low probability, catastrophic events. Both problems, and their interactions, impact on policy design and institutional performance for this class of problems. The paper discusses these impacts and their implications for developing and managing public policies

Assessment of the effectiveness of head only and back-of-the-head electrical stunning of chickens

The study assesses the effectiveness of reversible head-only and back-of-the-head electrical stunning of chickens using 130–950 mA per bird at 50 Hz AC

Finite temperature theory of the scissors mode in a Bose gas using the moment method

We use a generalized Gross-Pitaevskii equation for the condensate and a semi-classical kinetic equation for the noncondensate atoms to discuss the scissors mode in a trapped Bose-condensed gas at finite temperatures. Both equations include the effect of $C_{12}$ collisions between the condensate and noncondensate atoms. We solve the coupled moment equations describing oscillations of the quadrupole moments of the condensate and noncondensate components to find the collective mode frequencies and collisional damping rates as a function of temperature. Our calculations extend those of Gu\'ery-Odelin and Stringari at T=0 and in the normal phase. They complement the numerical results of Jackson and Zaremba, although Landau damping is left out of our approach. Our results are also used to calculate the quadrupole response function, which is related to the moment of inertia. It is shown explicitly that the moment of inertia of a trapped Bose gas at finite temperatures involves a sum of an irrotational component from the condensate and a rotational component from the thermal cloud atoms.Comment: 18 pages, 8 figure

Evaluation of a probe hybridization quantitative polymerase chain reaction assay for Cryptosporidium serpentis in eastern indigo snakes (Drymarchon couperi)

A probe-hybridization quantitative polymerase chain reaction assay specific for Cryptosporidium serpentis (qPCR) has been developed and shown to be extremely sensitive in the laboratory, but clinical sensitivity and specificity for this test are lacking. To approximate the sensitivity and specificity of the C. serpentis qPCR, the medical records from a captive snake colony were reviewed, and between November 2015 and June 2021, 63 eastern indigo snakes (Drymarchon couperi) were necropsied. Of these 63 snakes, 11 had qPCR performed on gastric biopsies collected at the time of necropsy, 8 had qPCR performed on samples collected by gastric swab within 35 days of necropsy, and 34 had qPCR performed on samples collected by cloacal swab within 84 days of necropsy. The qPCR results were then compared to the post-mortem histological findings, where all three sampling techniques had a 100% specificity. The sensitivity was highest in samples collected at necropsy (100%, CI: 63.06 – 100%) followed by the ante-mortem testing: gastric swab (87.50%, CI: 42.13 – 99.64%) and cloacal swab (66.67%, CI: 44.68 – 84.37%)

The relationship between smartphone use and smartphone addiction: An examination of logged and self-reported behavior in a pre-registered, two-wave sample

There has been a growing literature that has utilized logged behavior from smartphones to study the impacts of technology use on individuals. One of these proposed impacts has been that people become addicted to their smartphones. Measurements of smartphone addiction do not appear to strongly correlate with actual behavior logged from smartphones. Instead, smartphone addiction may be better explained by distress rather than disordered behavior, but this has not been adequately tested. This study examined the relative contributions of self-reported and actual smartphone behavior alongside key mental health and individual differences in a pre-registered, two-wave study with a two-week re-test. 511 smartphone users (391 at Time 2) completed measures of smartphone usage, attitudes towards smartphone usage, smartphone addiction, other behavioral addictions, mental health, and individual differences. The results suggest smartphone addiction is principally driven by perceived rather than actual usage, especially where these are discordant. Self-reported smartphone usage, other behavioral addictions, and the impulsivity facet of negative urgency are more predictive of smartphone addiction than logged behavior. These results suggest that volume of smartphone usage is insufficient in and of itself to explain problematic smartphone behavior and questions the criterion validity of smartphone addiction measurements

Vortex nucleation in Bose-Einstein condensates in time-dependent traps

Vortex nucleation in a Bose-Einstein condensate subject to a stirring potential is studied numerically using the zero-temperature, two-dimensional Gross-Pitaevskii equation. It is found that this theory is able to describe the creation of vortices, but not the crystallization of a vortex lattice. In the case of a rotating, slightly anisotropic harmonic potential, the numerical results reproduce experimental findings, thereby showing that finite temperatures are not necessary for vortex excitation below the quadrupole frequency. In the case of a condensate subject to stirring by a narrow rotating potential, the process of vortex excitation is described by a classical model that treats the multitude of vortices created by the stirrer as a continuously distributed vorticity at the center of the cloud, but retains a potential flow pattern at large distances from the center.Comment: 22 pages, 7 figures. Changes after referee report: one new figure, new refs. No conclusions altere

Second harmonic generation and birefringence of some ternary pnictide semiconductors

A first-principles study of the birefringence and the frequency dependent second harmonic generation (SHG) coefficients of the ternary pnictide semiconductors with formula ABC$_2$ (A = Zn, Cd; B = Si, Ge; C = As, P) with the chalcopyrite structures was carried out. We show that a simple empirical observation that a smaller value of the gap is correlated with larger value of SHG is qualitatively true. However, simple inverse power scaling laws between gaps and SHG were not found. Instead, the real value of the nonlinear response is a result of a very delicate balance between different intraband and interband terms.Comment: 13 pages, 12 figure