8,656 research outputs found
Competing in the RoboCup Rescue Robot League
No full textRoboCup Rescue is an international competition in which robots compete to find disaster victims in a simulated earthquake environment. It features both a Rescue Simulation League (RSL) which is entirely computer simulated, and a Rescue Robot League (RRL) with real robots and a test arena. This paper will describe the experience gained sending an undergraduate team to compete in the Rescue Robot League at the RoboCup German Open in 2008 and 2009. The design of the test arena and the rules of the competition will be outlined; as will the approaches taken by different teams; and the competition results
Le multipartisme d'État en Tunisie : la débâcle
No full textAli Ben Mehdi Mohammed. Le multipartisme d'État en Tunisie : la débâcle. In: Horizons Maghrébins - Le droit à la mémoire, N°46, 2002. Réalites tunisiennes : l'état de manque ; politique, économie, société, culture. Le haut-atlas marocain : vie sociale et cultures en terrasse. pp. 12-27
RETHINKING INDUSTRIAL POLICY
No full textDespite the hold of the neoliberal orthodoxy on policy making in developing countries, industrial policy remains important for the promotion of industrial development. However, the context for the design of industrial policy has profoundly changed as a result of new rules governing international trade, the rise of global value chains and marketing networks, and other aspects of globalization. Traditionally, the case for industrial policy has been framed in terms of “market failures” but the paper argues that that is not a sufficient basis. After addressing the traditional points of criticism, an attempt is made to outline the “domains” of industrial policy in the current circumstances, especially for industrially lagging countries. As country contexts differ widely there are no satisfactory blueprints for policy making that countries can readily adopt. As in production decisions, considerable ingenuity and innovation is needed in designing policies. This is all the more necessary as the WTO rules have become increasingly stringent and the rise of international trading networks has created new barriers for young firms to enter the world market. These developments have changed the context but not the importance of policy in industrial development. The paper identifies areas where government intervention is needed and can still make a positive difference.
Modulation of turbulence by finite-size particles in statistically steady-state homogeneous shear turbulence
No full textWe perform interface-resolved simulations to study the modulation of statistically steady-state homogeneous shear turbulence by neutrally buoyant finite-size particles. We consider two shapes, spheres and oblates, and various solid volume fractions, up to 20 %. The results show that a statistically steady state is not exclusive to single-phase homogeneous shear turbulence as the production and dissipation rates of the turbulent kinetic energy are also statistically in balance in particle-laden cases. The turbulent kinetic energy shows a non-monotonic behaviour with increasing solid volume fraction: increasing turbulence attenuation up to a certain concentration of solid particles and then enhancement of the turbulent kinetic energy at higher concentrations. This behaviour is observed at lower volume fractions for oblate particles than for spheres. The attenuation of the turbulence activity at lower volume fractions is explained through the enhancement of the dissipation rate close to the surface of particles. At higher volume fractions, however, particle pair interactions induce regions of high Reynolds shear stress, resulting in the enhancement of the turbulence activity. We show that the oblate particles of the considered size have larger rotational rates than spheres with no preferential orientation. This is in contrast to previous studies in wall-bounded flows where preferential orientation close to the wall and reduced rotation rates result in turbulence attenuation and thus drag reduction. Our results shed some light on the effect of rigid particles, smaller than the near-wall turbulent structures but still comparable to the viscous length scale, on the dynamics of the equilibrium logarithmic layer in wall-bounded flows
Comparison of PM and hybrid excited machines for marine vessel hybrid-electric propulsion
No full textThis paper evaluates the maximum torque capability of a hybrid excited synchronous machine in comparison with a conventional PM synchronous motor. The main focus of the paper is on the study of the effect of DC excitation magnetic flux on the saturation of the stator teeth,which limits the torque production capability of the hybrid machine. Magnetostatic and transient analyses are carried out for both motors. As expected the hybrid motor air gap flux controllability comes at the expense of reducing its torque density. The torque density reduction penalty is quantified and some hidden limitations and challenges of designing such a hybrid motor are revealed based on an in-depth analysis of the flux distribution within the machine
Process development for recovery of copper and precious metals from waste printed circuit boards with emphasize on palladium and gold leaching and precipitation
No full textTHE FATE OF PATENTS: AN EXPLORATORY ANALYSIS OF PATENTS AS IPO SIGNALS OF REPUTATIONAL ADVANTAGE
No full textDrawing on the reputation literature and signaling theory, this article builds on work that looks at
patents as reputation signals. We build a multi-industry database of patents that expire due to lack
of maintenance fee payments and test for a relationship between these patents and the firm’s IPO
date. We find a significant and positive relationship between the likelihood of patents expiring due
to lack of maintenance fee payments and the time to IPO. We also find that patents associated with
firms which are not venture capital backed, are more likely to expire. Our findings suggest that
patents that are used for signaling intentions are more likely to be underutilized. Implications for
research and policy are discussed
A RE-EXAMINATION OF THE ARCHITECTURE OF THE INTERNATIONAL ECONOMIC SYSTEM IN A GLOBAL SETTING: ISSUES AND PROPOSALS
No full textThe globalization of the world economy poses major challenges to the prevailing international economic system. The recent trade-investment system raises the issues of the marginalization of countries, firms, and agents if they are not capable to compete with large successful entities. The system engenders conflicts of interest in its interfacing with sovereign domains. In numerous cases such as employment and mutual trade benefits, it can produce zero sum outcomes. Consequently, significant segments of public opinion in many countries have mobilized against it. In the monetary and financial area, the system has from 1945 evolved on a piecemeal and ad hoc basis. In recent years, it has not been able to predict, prevent or effectively deal with financial crisis. It demonstrates a lacuna in global financial governance especially with respect to enforcing its rules on the major countries and bringing the private sector therein. The central institution, the IMF, is shown to be in need of basic reforms involving forging a global vision, reconsidering and updating conditionality, further democratization of political governance, and revamping the exchange rates and surveillance functions.
Removal of xanthate from aqueous solutions by adsorption onto untreated and acid/base treated activated carbons
No full textXanthate is a widely common pollutant in wastewaters of mineral industries. The removal of ethyl xanthate (EX-), the most widely used xanthates in mineral industries, from aqueous solutions was studied by activated carbon adsorption as the clean and cost-effective industrial wastewater treatment technology. The characterization of activated carbon (AC) was performed by a point of zero charge determination, scanning electron microscopy, wavelength dispersive X-ray, surface area, and a pore size analyzer. The evaluation of initial solution concentration, pH, temperature, particle size, and surface chemistry of AC on the adsorption process showed that it is a high-potential adsorbent for xanthate removal. The study of EX- adsorption onto acid/base treated ACs revealed that the adsorption of EX- primarily occurs on non-polar carbon surface patches where it is driven by hydrophobic interactions. The equilibrium and kinetic data were best modeled by the Koble-Corrigan isotherm and fractional power kinetic model, respectively. The rate-limiting step during the EX- adsorption onto AC was determined to be pore diffusion. The thermodynamic studies revealed that the adsorption process is spontaneous and endothermic
Edirneli Eskicizâde Ali Efendi’nin Şerhu’l-Emsile adlı eseri (inceleme ve tahkik)
No full textEDİRNELİ ESKİCİZÂDE ALİ EFENDİ’NİN ŞERHU’L-EMSİLE ADLI ESERİ (İNCELEME ve TAHKİK) Bu çalışmada XVIII. yüzyılın sonu ile XIX. yüzyılın ilk çeyreğine tekabül eden zaman diliminde yaşamış olan Osmanlı müelliflerinden Edirneli Eskicizâde Ali Mehdi Efendi (ö. 1243/ 1828) ve onun Şerhu’l-Emsile isimli eseri konu edilmiştir. Üç bölümden oluşan çalışmanın ilk bölümünde, sarf ilminin ortaya çıkışı, tarihi gelişimi ve el-Emsile adlı eser ele alınmıştır. İkinci bölümde müellifin hayatı ve eserleri hakkında bilgi verildikten sonra eser tanıtılarak tahkikte takip edilen usûl, müellifin üslubu, eserin öne çıkan özellikleri, ilmi değeri, muhtevası ele alınarak eserin kısaca değerlendirilmesi yapılmıştır. Üçüncü bölümde ise eserin tahkikli metnine yer verilmiştir. Bu çalışmayla Osmanlı döneminde kaleme alınan eserlerden birini gün yüzüne çıkararak, müellifin dil alanında yaptığı katkıları ortaya koymak ve Arap diline mütevazi bir katkıda bulunmak hedeflenmiştir.SHARH al-AMSILA THE WORK OF ESKİCİZÂDE ALİ EFENDİ FROM EDİRNE (ANALYSİS AND CRİTİCAL EDİTİON)In this study the Ottoman author Eskicizâde Ali Efendi from Edirne (time of death 1243/ 1828) who lived in the period that corresponds to the final of the XVIII. century and the first quarter of the XIX. century and his work titled as Sharh al-Amsıla are entreated. The work consists of three parts; in the first part historical developments, emergence of drainage science and the work of al-Amsila handlend. In the second part, after giving information about the life and works of Eskicizâde, the work was introduced and a brief review of the work was done by taking into consideration the method followed in the investigation, authour’s style, prominent characteristics of the work, scientific value and its content. In the third part, the text of the work is examined by critical edition. In this study, it is aimed to reveal one of the works written in the Ottoman period to put forward the author’s contributions in the field of language and to make a modest contribution to the Arabic language
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