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  • Resultat 1-10 av 1640483
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  • Wang, Yujin, et al. (författare)
  • Van Hove Singularity Modulation of Phonon Transport in Twisted Bilayer Graphene
  • 2023
  • Ingår i: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 127:49, s. 23752-23759
  • Tidskriftsartikel (refereegranskat)abstract
    • Twisted bilayer graphene (tBLG) exhibits remarkable optical and electrical properties, rendering it a promising material for future micro/nano devices. Nonetheless, efficient heat transport poses a critical challenge, and comprehending the influence of the twist angle on phonon properties is vital. In this study, we present the first analysis of the effects of the twist angle on phonon scattering near the Van Hove singularity. Our investigation reveals an extended lifetime of the G mode phonon due to electron-hole pair excitation near the critical angle accompanied by a substantial enhancement response. This phenomenon occurs when electron-phonon scattering is suppressed, leading to the dominance of phonon-phonon scattering in the transport process. Our study unveils the predominant control of the phonon-phonon scattering process by three-phonon scattering with the proportion directly influenced by the twist angle. This effect arises from the alteration in the phonon band structure, aligning with theoretical predictions acquired via molecular dynamics simulations. These findings contribute significant scientific insights into the phonon scattering behavior of tBLG, thereby informing the development of advanced micro/nano devices with enhanced performance. Furthermore, our study may open avenues for investigating the potential practical applications of tBLG and other twisted materials.
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  • Odén, Bertil (författare)
  • Sydafrika i södra Afrika
  • 1985
  • Bok (övrigt vetenskapligt/konstnärligt)abstract
    • En redovisning av och diskussion om 1980-talets ekonomiska struktur i södra Afrika och Sydafrikas dominans både ekonomiskt och militärt över grannstaterna.
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  • Tarnawski, Laura, et al. (författare)
  • Integrin Based Isolation Enables Purification of Murine Lineage Committed Cardiomyocytes
  • 2015
  • Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 10:8
  • Tidskriftsartikel (refereegranskat)abstract
    • In contrast to mature cardiomyocytes which have limited regenerative capacity, pluripotent stem cells represent a promising source for the generation of new cardiomyocytes. The tendency of pluripotent stem cells to form teratomas and the heterogeneity fromvarious differentiation stages and cardiomyocyte cell sub-types, however, are major obstacles to overcome before this type of therapy could be applied in a clinical setting. Thus, the identification of extracellularmarkers for specific cardiomyocyte progenitors and mature subpopulations is of particular importance. The delineation of cardiomyocyte surfacemarker patterns not only serves as a means to derive homogeneous cell populations by FACS, but is also an essential tool to understand cardiac development. By using single-cell expression profiling in early mouse embryonic hearts, we found that a combination of integrin alpha-1, alpha-5, alpha-6 and N-cadherin enables isolation of lineage committed murine cardiomyocytes. Additionally, we were able to separate trabecular cardiomyocytes from solid ventricular myocardium and atrial murine cells. These cells exhibit expected subtype specific phenotype confirmed by electrophysiological analysis. We show that integrin expression can be used for the isolation of living, functional and lineage-specific murine cardiomyocytes.
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  • Ismail, Evin, 1985- (författare)
  • The Antisemitic Origins of Islamist Violence : A Study of the Muslim Brotherhood and the Islamic State
  • 2022
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • The rise of the Islamic State, and its antisemitic ideology, has led to violence against Jews in Europe and a genocide of Shia Muslims in Iraq. This thesis investigates the causes and origins of Islamist antisemitic violence from a social identity perspective. It is the first systematic study of Islamist antisemitism and anti-Shiism that accounts for its trajectory from its inception in the 1930s until 2018. The material consists of primary sources of Islamist literature. First, it studies antisemitic perpetrators of Islamist attacks in Europe. Second, it analyses antisemitism in Islamic State propaganda. Third, it studies Sayyid Qutb's antisemitism. Lastly, it studies the anti-Shiite legacy of the Muslim Brotherhood-affiliated Sahwa movement. The study does not situate the problem of Islamist violence within the religion itself or the Sunni or Shia branch of Islam but rather within how political actors use religion for political purposes. This thesis challenges the conventional view of the Islamic State's violence as originating from the theological interpretations of Salafism and argues that rather, it originates from the political ideology of the Muslim Brotherhood. Furthermore, it centers antisemitism and its interconnected anti-Shiism at the core of Islamist ideology and use of violence. The findings demonstrate that mainly two concepts are central to Islamist antisemitic violence: the war against Islam conspiracy and the imaginary victimized ummah. Additionally, it shows that antisemitism and anti-Shiism are interconnected since the Sahwa movement and ISIS transferred antisemitic notions onto Shiites. The study also shows that the war against Islam conspiracy is the main feature of ISIS antisemitism and that it was developed by Sayyid Qutb, who inspired the Sahwa movement. It also demonstrates that the Sahwa movement inspired ISIS in their politicized genocidal anti- Shiism. The findings can be divided into seven categories: 1) the war against Islam conspiracy; 2) a politicization of religious identities; 3) Muslim identity as either victimized or martial; 4) the imaginary victimized ummah; 5) violence in defense of the imaginary victimized ummah; 6) a transfer of antisemitic notions onto Shiites; and 7) antisemitic Islamist excommunication of Muslims. This thesis argues that antisemitic and anti-Shiite violence is the result of the politicization of religious identities within a war narrative. In addition, this thesis demonstrates how the Muslim Brotherhood combined Nazi antisemitism with politicized interpretations of Islamic scripture, inspiring the Islamic State's Islamist antisemitism and violence. 
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  • Larsson, Oscar, Assistant professor, 1978- (författare)
  • The connections between crisis and war preparedness in Sweden
  • 2021
  • Ingår i: Security Dialogue. - : SAGE Publications. - 0967-0106 .- 1460-3640. ; 52:4, s. 206-324
  • Tidskriftsartikel (refereegranskat)abstract
    • Contemporary liberal and democratic states have ‘securitized’ a growing number of issues by advancing the notion of societal security. This is coupled with a proactive stance and the conception of building societal resilience in order to withstand future crises and disturbances. The preemptive logic of contemporary security and crisis management calls for a new type of resilient neoliberal subject who is willing to accept uncertainty and shoulder greater individual responsibility for her own security. This article offers a genealogical analysis of this development in Sweden since the end of the Cold War, highlighting the role now assigned to citizens within social and national security planning. I argue that seeking a return to a more traditional notion of ‘total defence’ blurs the previously important war/peace and crisis/security distinctions. While war preparedness in previous eras was an exceptional aspect of human life and citizenship, the conceptions of security now evolving bind together societal and national security such that civil and war preparedness are merged into an ever-present dimension of everyday existence. The analysis also reveals that the responsibilization of individuals introduces a moral dimension into security and generates new forms of citizen–citizen relations. These extricate the sovereign powers of the state and the liberalist social contract between the state and its citizens.
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