2,398 research outputs found

    A quantum heat engine with coupled superconducting resonators

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    We propose a quantum heat engine composed of two superconducting transmission line resonators interacting with each other via an optomechanical-like coupling. One resonator is periodically excited by a thermal pump. The incoherently driven resonator induces coherent oscillations in the other one due to the coupling. A limit cycle, indicating finite power output, emerges in the thermodynamical phase space. The system implements an all-electrical analog of a photonic piston. Instead of mechanical motion, the power output is obtained as a coherent electrical charging in our case. We explore the differences between the quantum and classical descriptions of our system by solving the quantum master equation and classical Langevin equations. Specifically, we calculate the mean number of excitations, second-order coherence, as well as the entropy, temperature, power and mean energy to reveal the signatures of quantum behavior in the statistical and thermodynamic properties of the system. We find evidence of a quantum enhancement in the power output of the engine at low temperatures.Comment: 15 pages, 14 figures, new references adde

    National (Dis)identification and Ethnic and Religious Identity:A Study Among Turkish-Dutch Muslims

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    National (dis)identification is examined in three studies among Turkish-Dutch Muslim participants. In explaining national (dis)identification, the first study focuses on ethnic identity, the second on ethnic and religious identity, and the third on three dimensions of religious identity. Many participants show low commitment to the nation, and many indicate national disidentification. In addition, there is very strong ethnic and religious identification. Ethnic and Muslim identifications relate negatively to Dutch identification and, in Study 3, to stronger Dutch disidentification. Furthermore, perceived group rejection is associated with increased ethnic minority and religious identification but also with decreased national Dutch identification. In addition, in Studies 1 and 2 the effect of perceived rejection on Dutch identification is (partly) mediated by minority group identification. The findings are discussed in relation to social psychological thinking about group identification, dual identities, and the importance of religion for intergroup relations

    The pollutant emissions from diesel-engine vehicles and exhaust aftertreatment systems

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    Diesel engines have high efficiency, durability, and reliability together with their low-operating cost. These important features make them the most preferred engines especially for heavy-duty vehicles. The interest in diesel engines has risen substantially day by day. In addition to the widespread use of these engines with many advantages, they play an important role in environmental pollution problems worldwide. Diesel engines are considered as one of the largest contributors to environmental pollution caused by exhaust emissions, and they are responsible for several health problems as well. Many policies have been imposed worldwide in recent years to reduce negative effects of diesel engine emissions on human health and environment. Many researches have been carried out on both diesel exhaust pollutant emissions and aftertreatment emission control technologies. In this paper, the emissions from diesel engines and their control systems are reviewed. The four main pollutant emissions from diesel engines (carbon monoxide-CO, hydrocarbons-HC, particulate matter-PM and nitrogen oxides-NOx) and control systems for these emissions (diesel oxidation catalyst, diesel particulate filter and selective catalytic reduction) are discussed. Each type of emissions and control systems is comprehensively examined. At the same time, the legal restrictions on exhaust-gas emissions around the world and the effects of exhaust-gas emissions on human health and environment are explained in this study

    Insecticidal Effect of Usnea longissima (Parmeliaceae) Extract against Sitophilus granarius (Coleoptera: Curculionidae)

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    Two secondary metabolites (diffractaic acid & usnic acid) and extract of a lichen species, Usnea longissima Ach. were tested against adults of Sitophilus granarius (L.) on Petri dishes. After exposure, mortality of the adults was determined at 24th, 48th and 96th h. The results showed that secondary metabolites and extract of U. longissima have an insecticidal effect on adults of Sitophilus granarius (L.) in comparison with controls. The insecticidal effect was influenced by the concentrations of the extracts and the exposure time. Higher concentrations and longer exposure time resulted in maximum toxicity on S. granarius. Treatment with extract and lichen compounds of U. longissima pointed out equal mortality against adults of S. granarius. The mortality rates after 96 h of treatment with the maximum concentration (10 mg mL-1) of U. longissima extract, diffractaic acid and usnic acid were determined as 98.98, 91.91 and 94.94% for S. granarius, respectively. However, there was no mortality in the controls. The mortality rates after 96 h of treatment with the 10 mg mL-1 in concentrations of the extract of U. longissima were established and the highest mortality rate was found against S. granarius with 98.98%

    The politics of Islamophobia in Turkey

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    This chapter analyses the dominant years of the politics of Islamophobia in Turkey, which roughly covers the years from the last decades of the nineteenth century to the late 1990s. It takes the definition of Islamophobia as the construction of Islam and Muslims as the enemy. Based on that definition, it argues that Islamophobia played a constitutive role in the establishment and construction of the modern Turkish state. First of all, the politics of Islamophobia served to replace the Ottoman Empire with the secular–nationalist Turkish Republic. Following the completion of this political transition, Islamophobia was deployed to produce a secular–nationalist reality, which included the forming of a secular– nationalist society in its domestic realm, backing a Westphalian regional order and a Western- centric global order on its outside. The politics of Islamophobia remained dominant in Turkish politics until the 2000s

    An overview of effects of high rise buildings on intersections: iconova

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    Gaziantep, Türkiye’nin sürekli gelişen ve büyüyen önemli sanayi şehirlerinden biridir. Artan nüfusun ve gelişen sanayinin bir sonucu olarak trafikteki araç sayısı her geçen gün artış göstermektedir. Nüfusun ihtiyaçlarını karşılayabilmek için yapılan yüksek katlı binaların sayısı azımsanmayacak kadar fazladır. Mevcut yolların kapasiteleri bu artışa bağlı olarak yetersiz kalmakta ve zaman içerisinde trafik akışında yavaşlamalara sebep olmaktadır. Iconova kavşağı, bu problemlerin yaşandığı kavşaklardan biridir. Primemall AVM’nin ve henüz tamamlanmamış olan yüksek katlı ICONOVA konutlarının aynı kavşakta yer almasından dolayı, şu anda kapasitesinin üst sınırlarında çalışan ICONOVA kavşağı, konutlar kullanılmaya başlayınca daha sıkışık hale gelecektir. Bu çalışmanın amacı, yüksek katlı yapıların trafiğe olan etkileri dikkate alınarak, daha uzun vadeli planlamalar yapmak ve HCM (Highway Capacity Manual) hesaplamaları ile VISSIM yazılımından faydalanarak Iconova kavşağı için çözüm önerisi sunmaktır. Bu çalışmayla, trafik akışının daha verimli hale getirilmesi amaçlanmıştır. Aynı zamanda, çalışmanın yüksek katlı yapıların trafiğe olan etkileri ve kavşak kapasite hesapları açısından bilimsel bir referans olması hedeflenmektedir

    God at work: an institutional perspective on the impact of religion on organizations

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    The dissertation presents an institutional perspective on the role of values and meaning for organizations focusing on the institutional logic of religion. At its core are Chapter III, a conceptual paper, and Chapters IV and V, empirical papers based on an in-depth two-years long ethnographic case study on the founding process of the first Islamic Bank in Germany. They are framed by an introductory chapter and a conclusion that address the overarching research question of how diverse institutional demands are managed within and beyond the boundaries of organizations, as well as a general literature review chapter that embeds the papers within the wider institutional theory literature. Chapter III presents a conceptualization that integrates religion, specifically Islam, with entrepreneurship along three interconnected pillars: the entrepreneurial, socio-economic/ethical and religio-spiritual; and outlines how Islam shapes entrepreneurship at the micro-, meso- and macro-level. It suggests the institutional logics perspective to further analyze the impact of religion on organizations, which the subsequent papers build on. Chapter IV extends theory on organizational hybridity by outlining polyphony and polysemy as two mutually reinforcing organizational responses, that allow competing logics to coexist without structurally separating or blending them, and that produce elastic hybridity, showing how hybrid organizations can accommodate competing logics that are both central and incompatible. Chapter V shows how organizations collectively and dynamically co-generate and co-resolve institutional complexity through four combinatory mechanisms: pushing, pulling, clarifying and tolerating. These are subsequently integrated into a framework based on their desired versus required and actual versus perceptual nature. Overall, this dissertation contributes to a better understanding of how organizations manage diverse institutional demands including religion

    Embracing Religions in Moral Theories of Leadership

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