675 research outputs found

    Developments in land mobile satellite service in Europe

    Get PDF
    The evolution of land mobile radio has reached a stage to benefit from satellite communications. The provision of a service on a pan-European basis makes the use of satellites a viable proposition. The paper describes the European position on both system and space segment aspects of the land mobile satellite service. Also, some of the functions of the European institutions, such as the European Telecommunications Standards Institute (ETSI), the Conference of European Postal and Telecommunications Administrations (CEPT), and the Commission of European Communities (CEC), in establishing these services are identified

    So You Want to Be a Writer

    Get PDF

    Prebisch-Singer Redux

    Get PDF
    In light of ongoing concern about commodity specialization in Latin America, this paper revisits the argument of Prebisch (1950) that, over the long term, declining terms of trade would frustrate the development goals of the region. This paper has two main objectives. The first is to clarify the issues raised by Prebisch and Singer (1950), as they relate the commodity specialization of developing countries (and Latin America in particular). The second is to reconsider empirically the issue of trends in commodity prices, using recent data and techniques. We show that rather than a downward trend, real primary prices over the last century have experienced one or more abrupt shifts, or “structural breaks,” downwards. The preponderance evidence points to a single break in 1921, with no trend, positive or negative, before or since.

    Economic orthodoxy and the East Asian crisis

    Get PDF
    It is now clear that the economic crisis that struck East Asia so suddenly and violently at the end of 1997 has irrevocably altered the political and economic landscape of the region. Major Asian companies have gone bankrupt, anxious domestic and foreign investors have relocated vast amounts of capital abroad, interest rates have skyrocketed, and inflation and unemployment have soared. At the same time, the economic crisis has also led to the collapse of several governments within the region. In South Korea, an opposition party led ..

    Evaluation of brick kiln performances using computational fluid dynamics (CFD)

    Get PDF
    Modern history of civilization is concurrent to the use of brick and its manufacturing. Nowadays tunnel kiln is the most widely used technology for brick production. This paper tries to provide an idea of the brick making process in tunnel kiln. The computational fluid dynamics (CFD) software, ANSYS CFX is being used to evaluate kiln performances using gas as its fuel. Simplified geometry was drawn and meshed using appropriate tools of ANSYS CFX. Several pertinent assumptions were made to reduce the complication of the simulation. Turbulence, combustion, radiation and NO models were adopted for simulation of a realistic tunnel kiln environment. Simulated temperature profile almost replicates industrial kiln situation as found in existing literature. CFD analysis helps to simulate the temperature profile of the brick kilns, the mass flow fractions of CO2 and NO emissions at outlet, and also the air velocity profile inside the kiln. The simulated temperature generated in a tunnel kiln is found to be between 1300 K and 300 K. CO2 and NOx volume generated inside the kiln is estimated as 1.01 m3/s and 0.108 m3/s respectively

    Lattice Green functions and diffusion for modelling traffic routing in ad hoc networks

    Get PDF
    We describe basic properties of Markov chains on finite state spaces and their application to Green functions, partial differential equations, and their (approximate) solution using random walks on a graph. Attention is paid to the influence of boundary conditions (Dirichlet/von Neumann). We apply these ideas to the study of traffic propagation and distribution in ad hoc networks

    Covid-19 and Emergency Medicine: A Scientometric Assessment of Global Publications

    Get PDF
    This study analyses Covid-19 and Emergency Medicine research output during 2020-2021 on different parameters including global publications share, citation impact, contribution of authors and patterns of research communication in most productive and preferred journals. Web of Science Citation Database has been used to retrieve the data for 2 years (2020-2021) with 991 publications using the combined search of Covid-19 with topic field and Emergency Medicine with using Web of Science Subject Categories. The USA tops the list, with a publications share of 38.6%(383) followed far by Italy and UK ranks second with 7.7%(76), Canada with 7.6% and India ranks 14th positions with global publications share of 1.7 %(17)). The most productive Institutions are: Harvard Medical University lead with 34 Publications and received 134 Citations followed by University Toronto with 29 (96 Citations), Massachusetts Gen Hospital with 26 (86 Citations), Monash University with 22 (92 Citations), Columbia University and University Ottawa with 18 publications. The top most 5 preferred Journals are: AMERICAN JOURNAL OF EMERGENCY MEDICINE (IF: 1.70 with 141 publication followed far by ANNALS OF EMERGENCY MEDICINE (IF: 5.35) with 97 publications, RESUSCITATION (IF: 4.57) with 77, WESTERN JOURNAL OF EMERGENCY MEDICINE (IF: 1.80) with 71 and EMERGENCY MEDICINE JOURNAL (IF: 2.04) with 64. But its average annual publication growth rate and global publication share is high and Citation quality as reflected in Average Citations Per Paper is less. Concludes that the research needs to increase its output and bring about improvement in the quality of its research efforts. This can be done by investing much more international collaboration and by modernizing and strengthening its research infrastructure in the field of Medicines

    The role of achievement goal orientation in the development of self efficacy during computer training

    Get PDF
    Computer self-efficacy (CSE) is a key factor that is related to performance in computer training. A study was conducted to understand the effects of achievement goal orientation on computer self efficacy development with 166 trainees using a database application. Results show that trainees with different achievement motivation dispositions have affects on CSE development through different paths. Individuals with high mastery approach and performance approach dispositions have positive effects on pre training CSE. Mastery avoidance disposition increases Computer Anxiety (CA), this is not seen with performance avoidance. Performance approach affects CSE development by increasing effort. The study provides initial evidence for the need for targeted interventions on CSE and CA, based on trainees’ goal orientation as a personality trait

    Nurses\u27 understanding and management of iron deficiency in Australia: A cross-sectional, exploratory study

    Get PDF
    Objectives: To assess the experiences and knowledge of nurses in the area of iron deficiency. Design: A cross-sectional, exploratory study using online survey. Setting: Data were collected from nurses working at various primary, secondary and tertiary Australian health practices and organisations. Participants: Australian nurses currently in practice. Method: Australian nurses currently in practice were invited to complete an online survey about their work background, personal experiences with iron deficiency and iron-deficiency identification and treatment. The survey included a nine-item questionnaire to assess knowledge of iron-deficiency risk factors and biochemistry. Results: A total of 534 eligible nurses participated in the survey. Participants were more likely to be female, aged 55-64 years, and working in general practice. Just under half (45.1 %) reported being diagnosed with iron deficiency themselves. Unusual fatigue or tiredness was the most frequent symptom that alerted nurses to potential iron deficiency in patients (reported by 91.9 % of nurses). Nurses who had participated in formal training around iron deficiency in the last 5 years demonstrated a significantly higher knowledge score (4.2 ± 2.1) compared with those who had not or were not sure about their formal training status (3.7 ± 1.9, p = 0.035). Knowledge around the understanding of functional iron deficiency was limited. Conclusions: Nurses report personal experiences of iron deficiency and show good knowledge of symptoms, demonstrating the potential for them to take a leading role in managing iron deficiency in patients. Educational programmes are required to address knowledge gaps and should be offered via various methods to accommodate a diverse nurse cohort. Our research highlights the potential for an expanded scope of practice for nurses in the primary care setting in the area of iron deficiency
    • …
    corecore