The Relationship Between Loneliness, Stress, and Alcohol Consumption Among College Students

As the misuse of alcohol among college students remains a public health concern in the United States, students are participating in problematic drinking for various reasons. Loneliness and stress have both been associated with the reasoning behind why some college students participate in heavy drinking. Studies show that students who perceive themselves as under a lot of stress tend to drink more and that students who feel they need to overcome structural and emotional barriers such as loneliness and shyness, use alcohol as a resource. This paper examines the relationship between alcohol consumption, loneliness, and stress. Sixteen students, who attended Abilene Christian University and participated in the Brief Alcohol Screening and Intervention for College Students (BASICS), completed three scales to assess their alcohol use, perceived loneliness, and perceived stress. Results indicated that loneliness was not significantly associated with binge drinking, that stress was not significantly associated with binge drinking, and that males did not consume more alcohol, experience more loneliness or more stress than females. Although statistical significance was not found, it was determined that clinical significance was present

Task analysis for error identification: Theory, method and validation

This paper presents the underlying theory of Task Analysis for Error Identification. The aim is to illustrate the development of a method that has been proposed for the evaluation of prototypical designs from the perspective of predicting human error. The paper presents the method applied to representative examples. The methodology is considered in terms of the various validation studies that have been conducted, and is discussed in the light of a specific case study

Sustainable Design: Using Physical Prototypes to Most Benefit Design Students and Environment?

After reviewing the main environmental areas of concern today, this paper will focus on waste management within the area of sustainability. For many years, as part of the design process, physical prototypes were a necessary. This was in order to prove a design‘s functionality and safety. They were expensive, time consuming and, by todays standards wastful. Often, once production began, they were scrapped. The necessity of a physical prototype outweighed all environmental considerations. In the 21st century, with the growth in Computer Aided Engineering (CAE), physical prototypes have nearly been replaced with virtual prototypes. The evidence is overwhelming as to the benfits of virtual prototypes to designers, designs and the environment. This paper will research and identify an area where physical prototypes are still beneficial, that of educating design engineers. A survey of mechanical engineering students over 5 years will identify a significant difference in the basic engineering knowledge of full-time engineering students when compared with their part-time colleagues. The use of physical prototypes can help reduce this difference. This paper argues that physical prototypes, under certain conditions, can reduce waste and still be sustainable

Using behavioral economics concepts to increase organizational learning in an NHS hospital

Purpose The purpose of this paper is to assess whether the dissemination systems that hospitals use to spread information about particular safety incidents can be enhanced using behavioural economics concepts. Design/methodology/approach The current service evaluation took place within eight wards in a single acute care hospital. It was conducted as a randomized controlled trial with two groups. In the control group nothing was altered. In the intervention group ward managers received additional support to disseminate information to their nurses. Nurses were randomly selected to be surveyed during their scheduled shifts. The surveys revealed how the nurses learned about particular safety incidents and how many they remembered. Findings Nurses in the intervention group were more likely to learn about particular safety incidents than nurses in the control group. Practical implications Enhancing common dissemination systems in hospitals can increase organizational learning about safety incidents. The current study presents some means by which dissemination systems can be enhanced. Originality/value The current service evaluation is a unique application of behavioural economics concepts to enhance organizational learning of particular adverse safety incidents in an NHS hospital

Human-centred explanations for artificial intelligence systems

As Artificial Intelligence (AI) systems increase in capability, so there are growing concerns over the ways in which the recommendations they provide can affect people's everyday life and decisions. The field of Explainable AI (XAI) aims to address such concerns but there is often a neglect of the human in this process. We present a formal definition of human-centred XAI and illustrate the application of this formalism to the design of a user interface. The user interface supports users in indicating their preferences relevant to a situation and to compare their preferences with those of a computer recommendation system. A user trial is conducted to evaluate the resulting user interface. From the user trial, we believe that users are able to appreciate how their preferences can influence computer recommendations, and how these might contrast with the preferences used by the computer. We provide guidelines of implementing human-centred XAI.</p

Instability of the massive Klein-Gordon field on the Kerr spacetime

We investigate the instability of the massive scalar field in the vicinity of a rotating black hole. The instability arises from amplification caused by the classical superradiance effect. The instability affects bound states: solutions to the massive Klein-Gordon equation which tend to zero at infinity. We calculate the spectrum of bound state frequencies on the Kerr background using a continued fraction method, adapted from studies of quasinormal modes. We demonstrate that the instability is most significant for the $l = 1$, $m = 1$ state, for $M \mu \lesssim 0.5$. For a fast rotating hole ($a = 0.99$) we find a maximum growth rate of $\tau^{-1} \approx 1.5 \times 10^{-7} (GM/c^3)^{-1}$, at $M \mu \approx 0.42$. The physical implications are discussed.Comment: Added references. 27 pages, 7 figure

Manufactured Nano-Objects Confer Viral Protection against Cucurbit Chlorotic Yellows Virus (CCYV) Infecting Nicotiana benthamiana

Nanotechnology has emerged as a new tool to combat phytopathogens in agricultural crops. Cucurbit chlorotic yellows virus (CCYV) mainly infects Solanaceae crops and causes significant crop losses. Nanomaterials (NMs) may have efficacy against plant viruses, but the mechanisms underlying complex nanomaterials-plant-virus interactions remain elusive. We challenged Nicotiana benthamiana plants with GFP-tagged CCYV and observed morphological, physiological, and molecular changes in response to 21-d foliar exposure to nanoscale Fe and Zn and C60 fullerenes at 100 mg/L concentration for 21 days. We observed that in response to C60 (100 mg/L) treatment, plants displayed a normal phenotype while the viral infection was not seen until 5 days post-inoculation. On the contrary, Fe and Zn were unable to suppress viral progression. The mRNA transcriptional analysis for GFP and viral coat protein revealed that the transcripts of both genes were 5-fold reduced in response to C60 treatment. Evaluation of the chloroplast ultrastructure showed that NMs treatment maintained the normal chloroplast structure in the plants as compared to untreated plants. C60 upregulated the defense-related phytohormones (abscisic acid and salicylic acid) by 42–43%. Our results demonstrate the protective function of carbon-based NMs, with suppression of CCYV symptoms via inhibition of viral replication and systemic movement

Spin-wave scattering at low temperatures in manganite films

The temperature $T$ and magnetic field $H$ dependence of the resistivity $\rho$ has been measured for La$_{0.8-y}$Sr$_{0.2}$MnO$_{3}$ (y=0 and 0.128) films grown on (100) SrTiO$_{3}$ substrates. The low-temperature $\rho$ in the ferromagnetic metallic region follows well $\rho (H,T)=\rho _{0}(H)+A(H)\omega_{s}/\sinh (\hbar \omega_{s}/2k_{B}T)+B(H)T^{7/2}$ with $\rho _{0}$ being the residual resistivity. We attribute the second and third term to small-polaron and spin-wave scattering, respectively. Our analysis based on these scattering mechanisms also gives the observed difference between the metal-insulator transition temperatures of the films studied. Transport measurements in applied magnetic field further indicate that spin-wave scattering is a key transport mechanism at low temperatures.Comment: 5 pages, 4 figures. to appear in Phys. Rev.

A hysteretic multiscale formulation for nonlinear dynamic analysis of composite materials

This article has been made available through the Brunel Open Access Publishing Fund.A new multiscale finite element formulation is presented for nonlinear dynamic analysis of heterogeneous structures. The proposed multiscale approach utilizes the hysteretic finite element method to model the microstructure. Using the proposed computational scheme, the micro-basis functions, that are used to map the microdisplacement components to the coarse mesh, are only evaluated once and remain constant throughout the analysis procedure. This is accomplished by treating inelasticity at the micro-elemental level through properly defined hysteretic evolution equations. Two types of imposed boundary conditions are considered for the derivation of the multiscale basis functions, namely the linear and periodic boundary conditions. The validity of the proposed formulation as well as its computational efficiency are verified through illustrative numerical experiments