Friend or Foe: Perceptions of China in Africa

China\u27s rush to Africa for resources and a sphere of influence has inspired much debate in the academic world. Many western scholars generalize China\u27s Africa strategy or African perceptions of that strategy. These are both grave mistakes. While China\u27s objectives in Africa are the same all over, the way it achieves that strategy varies from nation to nation. In addition, African perceptions of China vary from nation to nation. Using Algeria and Niger as main case studies, this paper will show that the wealth of a nation changes the way that the Chinese government and Chinese nationals interact with that nation, and, that this modification of behavior is what causes positive or negative perceptions of China

The archaeology of rock art in Northern Africa

The first reports on the rock art of north Africa were written in the mid-nineteenth century. Since then, rock art has become a key area of African archaeological research. Commencing with a short background on the environmental setting, this chapter reviews past research and major theoretical perspectives through to the present, highlighting contributions to wider debates. The main geographical, temporal, and archaeological frameworks of north African rock art are summarized in broad chronological order, beginning with late Pleistocene engravings up to ‘Camel art’ of more recent, historical age. Despite current hurdles faced in today’s research environment, rock art studies are of great importance in north Africa, especially when undertaken by African scholars. This precious, irreplaceable, nonrenewable cultural resource is of great educational value, and its preservation, teaching, and dissemination may contribute to a renewed awareness of the cultural value of rock art for future generations

The Constitutional Legitimacy of the EU Committees

An impressive number of transnational committees populates theEU institutional system. Their statutes and internal regulations arealmost all unpublished, their composition and agendas are largelyunknown, their meetings inaccessible. Nevertheless, this almostimpenetrable «jungle» is actually the life force animating EU decisionmaking:all implementing measures are defined and approved by thecomitology committees; agreement on the substance of most legislativemeasures is reached at the level of Council working groups; theCommission’s power of initiative is exercised by – or, at least, sharedwith – committees composed of national officials. Is this seeminglytechnocratic nightmare radically unconstitutional? The answer I putforward in this paper is negative. After a brief discussion of the ECJ’sformalistic approach to the comitology issue, I shall argue that: a) thecommittee system coheres with a functional (or vertical) understanding ofthe principle of institutional balance anchoring the European compositesystem; b) in such a multi-level system, the existing mechanisms forensuring the accountability of administrative bodies cannot beunderstood by the classic hierarchical «transmission belt model»; c)notwithstanding recent improvements in the transparency and therationality of certain kinds of committees, there are still parts of thisjungle in which law’s legitimising potential remains hidden.regulations; constitution building; constitutional change

Transient Marangoni convection in hanging evaporating drops

Abstract. A combined experimental and numerical analysis has been carried out to study Marangoni effects during the evaporation of droplets. The experiments are performed with pendant drops of silicone oils (with different viscosities) and hydrocarbons. The temperature of the disk sustaining the drop is rapidly increased or decreased in order to study transient heating or cooling processes. The velocity field in the droplet is evaluated monitoring the motion of tracers in the meridian plane, using a laser sheet illumination system and a video camera. Surface temperature distributions of the drops are detected by infrared thermocamera. The numerical model is based on axisymmetric Navier-Stokes equations, taking into account the presence of Marangoni shear stresses and evaporative cooling at the liquid-air interface. Marangoni flows cause a larger, more uniform surface temperature, increasing heat transfer from disk to droplet, as well as evaporation rate. When Marangoni effects are negligible, larger surface temperature differences occur along the drop surface and heat transfer is relatively small. The role of Marangoni and buoyancy flows in silicone oils with different viscosities and hydrocarbons is discussed and correlations are presented between experimental and numerical results. Keywords: Viscosity of liquids; diffusive momentum transport, Evaporation and condensation, Surface tension and related phenomena, Flows in ducts, channels, nozzles, and conduit

A brief summary of the attempts to develop large wind-electric generating systems in the US

Interest in developing large wind-electric generating systems in the United States was simulated primarily by one man, Palmer C. Putnam. He was responsible for the construction of the 1250 kilowatt Smith-Putnam wind-electric plant. The existence of this system prompted the U. S. Federal Power Commission to investigate the potential of using the winds as a source energy. Also, in 1933 prior to Putnam's effort, there was an abortive attempt by J. D. Madaras to develop a wind system based on the Magnus effect. These three projects comprise the only serious efforts in America to develop large wind driven plants. In this paper the history of each project is briefly described. Also discussed are some of the reasons why wind energy was not seriously considered as a major source of energy for the U. S

A method for predicting interfacial freezing of a liquid flowing over a cold surface

Instantaneous thickness of a frozen layer is a function of specific heat, heat of fusion, temperatures, the frozen layer thickness at equilibrium, the thermal conductivity, and heat transfer coefficient. The equation can be evaluated on a desk calculator

Film and Tourism. An Information System for Disclosing the Cinematographic Attractiveness of Destinations (Giulia Lavarone pp.289-291)

The Department of Cultural Heritage of the University of Padova investigated the topic of film-induced tourism in a year-long project, concluded in April 2015, titled Strumenti innovativi per la promozione turistica: film-induced tourism (Novel Tools to Promote Tourism: Film-induced Tourism). The project was financed by the Veneto Region through ESF funds. It brought together the expertise of film scholars, computer scientists and destination management experts, in partnership with public bodies (Provincia di Padova) and ICT companies. The goal of the project was to develop an information system that fosters film-induced tourism combining data about a geographical area and the movies produced in it. The system is designed as a platform to store and convey rich contents, able to address the needs of the tourist but also of stakeholders as DMOs and film commissions. The system was planned as a model for the destinations which could take advantage of a significant cinematographic background, yet are unlikely to spontaneously produce considerable film-induced tourism phenomena. The province of Padova has been used as a case study

Industrial Symbiosis for a Sustainable City: Technical, Economical and Organizational Issues

In this paper, we propose the adoption of industrial symbiosis approach within cities as a tool to improve their environmental sustainability. In particular, organic waste can be used to produce electric energy required by cities. In this way, a resource closed loop is generated, able to reduce the amount of waste disposed of in landfill and the energy purchased from outside the city. We develop a conceptual model that identifies symbiotic flows and processes that generate and receive them. We model these processes using the input-output approach. An efficiency measure of the symbiotic approach within urban areas has been proposed. Finally, we employ three case examples in order to show how the model works. As a result, we provide some useful managerial suggestions for policy makers about the implementation of industrial symbiosis within cities

Simulated fuel assembly Patent

Simulated fuel assembly-type flow measurement apparatus for coolant flow in reactor cor