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6 results

Intermediate Macroeconomics with Chinese Perspectives
  • A Calculus-based Approach
  • Junhui Qian
  • Published online:
    10 November 2023
    Print publication:
    19 October 2023
  • This is an intermediate-level macroeconomics textbook for undergraduate students who wish to gain some exposure to the Chinese economy while learning macroeconomics. And this is a truly "intermediate-level" textbook since it provides a calculus treatment of the standard intermediate macroeconomic theories such as the Solow models, IS-LM models, and so on. Students in many countries need an alternative macroeconomics textbook that is less American-centric than the existing ones. In particular, students in many developing countries need to learn about theories (e.g., the Lewis model of economic development) and cases (the Asian Financial Crisis) that are relevant to developing countries but are ignored in mainstream English textbooks. The use of calculus makes the textbook concise without sacrificing depth. And most importantly, after some training, students would feel comfortable with applying mathematics, the "engine of inquiry", to macroeconomic analysis.

  • Fluctuations in loneliness due to changes in frequency of social interactions among older adults: a weekly based diary study

  • R. Awad, S. G. Shamay-Tsoory, Y. Palgi
  • Journal:
    International Psychogeriatrics / Volume 35 / Issue 6 / June 2023
    Published online by Cambridge University Press:
    03 April 2023, pp. 293-303
    • Article
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  • Objectives:

    Loneliness functionally varies and is determined by the degree of interaction with others. We examined weekly fluctuations in reported loneliness as a function of frequency of social interactions in old age. We hypothesized that emotional and social components of loneliness would be related to different types of social relationships.

    Design:

    Participants reported their feeling of loneliness and their social interaction quantity (frequency of meetings) via a weekly based diary, over 6 weeks.

    Setting:

    Diary study.

    Participants:

    The study included 55 older adults with different dwelling arrangements (M = 73.4, SD = 6.97).

    Measurements:

    Measures of Loneliness (the De Jong-Gierveld Loneliness Scale), Social Interaction and Contact, and sociodemographic parameters were used.

    Results:

    Social and emotional loneliness fluctuated over the course of the 6-week study. Frequency of meeting friends was related to emotional loneliness and total feelings of loneliness. Frequency of meeting close/trusted figures was related to emotional loneliness which appeared the following week. Other variables were not associated with either changes in loneliness or its dimensions.

    Conclusions:

    Loneliness in old age is changeable. The emotional component of loneliness seems to be dominant in determining overall feelings of loneliness and is more sensitive to externally chosen social interaction.

  • The acquisition of English articles among L1 Dagbani L2 English learners

  • Abukari Kwame, Marit Westergaard
  • Journal:
    Canadian Journal of Linguistics/Revue canadienne de linguistique / Volume 65 / Issue 4 / December 2020
    Published online by Cambridge University Press:
    10 November 2020, pp. 496-534
    • Article
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  • This study investigates the acquisition of articles in L2 English by L1 speakers of Dagbani, a Gur language spoken in Ghana. Dagbani differs from English in that it has two definite articles, no indefinite article, and a zero-article which may express definiteness, indefiniteness as well as genericity. The study consisted of a Forced-choice task (FCT) and an Acceptability judgement task (AJT) which were administered to Dagbani teenagers with an intermediate proficiency in English (n = 45) and a group of native English speakers as controls (n = 8). The results showed that the learners’ article choice was based on definiteness, not specificity (i.e., no fluctuation between the two) and that they had slightly more problems with indefinite than definite contexts, while generic contexts were the most problematic. Except for a certain task effect as well as a possible interference of instruction (in the FCT), the results can be argued to generally be due to influence from the L1 and to the difficulty of feature reassembly.

  • 1 - Overview: Main Themes. Key Issues. Reader’s Guide

  • Bei-Lok B. Hu, University of Maryland, College Park, Enric Verdaguer, Universitat de Barcelona
  • Book:
    Semiclassical and Stochastic Gravity
    Published online:
    20 January 2020
    Print publication:
    05 March 2020, pp 1-34

  • Summary

    This chapter is an overview, placing the body of work described in this book in perspective and describing its overarching structure, namely, how the three levels of structure are related: quantum field theory in curved spacetime established in the 1970s, semiclassical gravity developed in the 80s and stochastic gravity introduced in the 90s, a manifestation of the almost ubiquitous existence of a semiclassical and a stochastic regime in relation to quantum and classical in the description of physical systems. We describe the main physical issues in semiclassical and stochastic gravity, namely, backreaction and fluctuations, the mathematical tools used, and their applications to physical problems in early universe cosmology and black hole physics. In terms of connection to related disciplines, it is pointed out that the popular Newton–Schrödinger equation cherished in alternative quantum theories does not belong to semiclassical gravity, as it is not derivable from quantum field theory and general relativity. However, stochastic gravity is needed for quantum information issues involving gravity. These theories enter even in the low-energy, weak-gravity realm where laboratory experiments are carried out. We finish with a summary of the contents of each chapter and a guide to readers.

  • Good days and bad days in dementia: a qualitative chart review of variable symptom expression

  • Kenneth Rockwood, Sherri Fay, Laura Hamilton, Elyse Ross, Paige Moorhouse
  • Journal:
    International Psychogeriatrics / Volume 26 / Issue 8 / August 2014
    Published online by Cambridge University Press:
    24 February 2014, pp. 1239-1246
  • Background:

    Despite its importance in the lived experience of dementia, symptom fluctuation has been little studied outside Lewy body dementia. We aimed to characterize symptom fluctuation in patients with Alzheimer's disease (AD) and mixed dementia.

    Methods:

    A qualitative analysis of health records that included notations on good days and bad days yielded 52 community-dwelling patients (women, n = 30; aged 39–91 years; mild dementia, n = 26, chiefly AD, n = 36).

    Results:

    Good days/bad days were most often described as changes in the same core set of symptoms (e.g. less/more verbal repetition). In other cases, only good or only bad days were described (e.g. no bad days, better sense of humor on good days). Good days were typically associated with improved global cognition, function, interest, and initiation. Bad days were associated with frequent verbal repetition, poor memory, increased agitation and other disruptive behaviors.

    Conclusions:

    Clinically important variability in symptoms appears common in AD and mixed dementia. Even so, what makes a day “good” is not simply more (or less) of what makes a day “bad”. Further investigation of the factors that facilitate or encourage good days and mitigate bad days may help improve quality of life for patients and caregivers.

  • Population dynamics of the stem-borer complex on sugar-cane in Southern Ghana

  • M. A. Sampson, R. Kumar
  • Journal:
    Insect Science and Its Application / Volume 4 / Issue 1-2 / June 1983
    Published online by Cambridge University Press:
    19 September 2011, pp. 25-32
    Print publication:
    June 1983

  • Population dynamics of the larvae of Eldana saccharina Walker, Chilo zacconius Bleszynski and Sesamia spp. on sugar-cane was studied over a period of 3 years, by regular sampling. Analysis of results indicated that during the first rainy season (March–June) the borer populations were low. However, the larval population increased considerably during the dry season and declined gradually during the second rainy season (September–November). Rainfall in Southern Ghana is typically bimo-dal, but it is occasionally evenly distributed throughout the year. When rainfall was evenly distributed. borer populations remained consistently low throughout the year. Flooding reduced the population of E. saccharina larvae in the field. Though the stem-borers showed preference for relatively younger canes, the type of borers present and their proportions varied with the sugar-cane phenology.