Incorporating the advantages of clickers and mobile devices to teach Economics to non-economists

In the twenty-first century, teaching practitioners in higher education (HE) have found themselves confronted with more challenges to help students engage in learning. Particularly, one of the main problems with the traditional lecture format to teach non-economists economics is that students tend to lack interest in the subject and therefore have a low level of engagement. Student response systems (i.e. "clickers") have been used in classes for about 20 years and become more popular on many college campuses. Many studies reveal that clicker technology offers great promise in increasing students' participation and engagement in lectures. Meanwhile, thanks to fast development of mobile technology, personal mobile devices can be integrated with clicker systems into teaching and learning with improved features. The programme we used and found as a very useful interactive teaching tool for learning is called Kahoot!. This paper offers a brief guidance on how to use Kahoot! to encourage active learning and engage non-economics majors in learning economics. Meanwhile, the existing relevant literature with regard to the use of clickers in HE is highlighted. In addition, the effectiveness of using Kahoot! in teaching economics to non-economists is evaluated by a student survey

Ultrasound Capsule Endoscopy With a Mechanically Scanning Micro-ultrasound:A Porcine Study

Wireless capsule endoscopy has been used for the clinical examination of the gastrointestinal (GI) tract for two decades. However, most commercially available devices only utilise optical imaging to examine the GI wall surface. Using this sensing modality, pathology within the GI wall cannot be detected. Micro-ultrasound (μUS) using high-frequency (>20 MHz) ultrasound can provide a means of transmural or cross-sectional image of the GI tract. Depth of imaging is approximately 10 mm with a resolution of between 40–120 μm that is sufficient to differentiate between subsurface histologic layers of the various regions of the GI tract. Ultrasound capsule endoscopy (USCE) uses a capsule equipped with μUS transducers that are capable of imaging below the GI wall surface, offering thereby a complementary sensing technique to optical imaging capsule endoscopy. In this work, a USCE device integrated with a ∼30 MHz ultrasonic transducer was developed to capture a full 360° image of the lumen. The performance of the device was initially evaluated using a wire phantom, indicating an axial resolution of 69.0 μm and lateral resolution of 262.5 μm. Later, in vivo imaging performance was characterised in the oesophagus and small intestine of anaesthetized pigs. The reconstructed images demonstrate clear layer differentiation of the lumen wall. The tissue thicknesses measured from the B-scan images show good agreement with ex vivo images from the literature. The high-resolution ultrasound images in the in vivo porcine model achieved with this device is an encouraging preliminary step in the translation of these devices toward future clinical use

Study of Muscle Cell Dedifferentiation after Skeletal Muscle Injury of Mice with a Cre-Lox System

Background: Dedifferentiation of muscle cells in the tissue of mammals has yet to be observed. One of the challenges facing the study of skeletal muscle cell dedifferentiation is the availability of a reliable model that can confidentially distinguish differentiated cell populations of myotubes and non-fused mononuclear cells, including stem cells that can coexist within the population of cells being studied. Methodology/Principal Findings: In the current study, we created a Cre/Lox-β-galactosidase system, which can specifically tag differentiated multinuclear myotubes and myotube-generated mononuclear cells based on the activation of the marker gene, β-galactosidase. By using this system in an adult mouse model, we found that β-galactosidase positive mononuclear cells were generated from β-galactosidase positive multinuclear myofibers upon muscle injury. We also demonstrated that these mononuclear cells can develop into a variety of different muscle cell lineages, i.e., myoblasts, satellite cells, and muscle derived stem cells. Conclusions/Significance: These novel findings demonstrated, for the first time, that cellular dedifferentiation of skeletal muscle cells actually occurs in mammalian skeletal muscle following traumatic injury in vivo. © 2011 Mu et al

Three essays on regulation and comptetition in the Chinese telecommunications industry

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

An Econometric Analysis of the Twin Deficits Hypothesis in Greece During the Period 1960 – 2014

The relationship between budget and trade deficits attracted the interest of many scholars during the last two decades. Many economists linked the large fiscal deficits and public debt with the trade imbalances. In this paper, we apply annual data in order to investigate the twin deficits hypothesis in a small open economy like Greece during the last 6 decades, which has faced many problems with public debt and deficits. We deploy cointegration techniques, as well as, the Granger causality tests in order to identify the direction of causality between the two forms of the deficits. We find that there is a long run relationship between the two variables, while the causality is running from the budget to the current account deficit, which provides support to the twin deficits hypothesis. This is in accordance with the Mundell-Fleming theory which suggests that there should be a causal relationship between the budget and the trade deficit, and moreover, this causality runs primarily from fiscal deficits to the current account deficits. JEL Classification: C22, F32, F41, H6

THE INEQUALITY OF NATURAL RESOURCES CONSUMPTION AND ITS RELATIONSHIP WITH THE SOCIAL DEVELOPMENT LEVEL BASED ON THE ECOLOGICAL FOOTPRINT AND THE HDI

This paper aims to provide a better understanding of the current situation of natural resources consumption in the world and its relationship with the level of social development. The Ecological Footprint concept is used to indicate human beings' environmental impact, and the Human Development Index (HDI) is used as a process for the social development level. Based on the dataset of 136 countries from the World Wildlife Fund (WWF), we calculate the Gini coefficients of the total Ecological Footprint per person (EF) and its sub items, i.e., Renewable Resources Footprint per person (REF) and Energy Footprint per person (EEF). The results indicate that significant inequality exists in natural resources consumption among the 136 countries from 1996 to 2005, and inequality of the EEF is the largest. We also calculate the Lorenz asymmetry coefficients of EF, REF and EEF, which are all greater than 1, indicating that the inequality results from some countries having extremely high resources consumption. The regression analyses of EF, REF and EEF with HDI, respectively, are made to show that there is a significant U-shaped relationship between natural resources consumption per person and the social development level rather than an inverted U-shaped relationship. Therefore, the Environmental Kuznets Curve (EKC) hypothesis is not supported by this research.Ecological footprint, Environmental Kuznets Curve, Gini coefficient, Human Development Index (HDI), Lorenz asymmetry coefficient