North Korean secondary asylum in the UK

The number of North Korean secondary migrants from South Korea has grown markedly in the last ten years. Drawing on semi-structured interviews, focus group discussions, and participatory observation conducted between 2012-2017, this article explores the motivations for North Korean secondary migration and the role of transnational networks in the migration and settlement trajectory. Our findings suggest that many North Koreans in South Korea feel discriminated against due to their origins, and unable to engage in upward social mobility. We argue that North Korean secondary migration to the United Kingdom (UK) is not a linear process of push and pull factors but a highly reactive and unpredictable one that depends on information fed by brokers. The UK hosts one of the largest communities of North Koreans outside Northeast Asia. Most North Koreans in the UK are secondary asylum seekers from South Korea. Their life in the UK, however, comes with its own set of challenges, some of which mirror co-ethnic or ideological frictions among North Koreans themselves, with the Korean-Chinese, or with South Koreans. This paper contributes to debates on multiple migration, providing a migrant-centric perspective to answer why people who are offered material benefits in the country they arrive in choose to on-migrate to a place where life can be often more challenging

Patriotic Revolutionaries and Imperial Sympathizers: Identity and selfhood of Korean-Japanese migrants from Japan to North Korea

While the outward migration of North Korean refugees has received a growing interest in scholarly circles, little has been said about emigration to North Korea. Drawing on ethnographic and archival research, this article considers the changing political subjectivities of migrants from Japan to the DPRK, from 1959 to the 1980s, and their relationship to both the ethnic homeland and the former colonizer. I suggest that the North Korean state’s effort to contain the imagined threat posed by arrivals from Japan was undermined by transnational exchange between divided families. Specifically, women on both sides of the East Sea/Sea of Japan engaged in kin work (di Leonardo 1987) that alerted ethnic Korean immigrants to their ambiguous status as both fraternal comrade and outsider in North Korea. My research illustrates how mobility provided opportunities for new subjectivities to emerge, as individuals who considered themselves Korean patriots developed identifications that translocally connected them to kin and communities in Japan

Surveillance and falsification implications for open source intelligence investigations

© 2015 ACM. Legitimacy of surveillance is crucial to safeguarding validity of OSINT data as a tool for law-enforcement agencies

Thermodynamics with long-range interactions: from Ising models to black-holes

New methods are presented which enables one to analyze the thermodynamics of systems with long-range interactions. Generically, such systems have entropies which are non-extensive, (do not scale with the size of the system). We show how to calculate the degree of non-extensivity for such a system. We find that a system interacting with a heat reservoir is in a probability distribution of canonical ensembles. The system still possesses a parameter akin to a global temperature, which is constant throughout the substance. There is also a useful quantity which acts like a {\it local temperatures} and it varies throughout the substance. These quantities are closely related to counterparts found in general relativity. A lattice model with long-range spin-spin coupling is studied. This is compared with systems such as those encountered in general relativity, and gravitating systems with Newtonian-type interactions. A long-range lattice model is presented which can be seen as a black-hole analog. One finds that the analog's temperature and entropy have many properties which are found in black-holes. Finally, the entropy scaling behavior of a gravitating perfect fluid of constant density is calculated. For weak interactions, the entropy scales like the volume of the system. As the interactions become stronger, the entropy becomes higher near the surface of the system, and becomes more area-scaling.Comment: Corrects some typos found in published version. Title changed 22 pages, 2 figure

Bell inequalities and entanglement in solid state devices

Bell-inequality checks constitute a probe of entanglement -- given a source of entangled particles, their violation are a signature of the non-local nature of quantum mechanics. Here, we study a solid state device producing pairs of entangled electrons, a superconductor emitting Cooper pairs properly split into the two arms of a normal-metallic fork with the help of appropriate filters. We formulate Bell-type inequalities in terms of current-current cross-correlators, the natural quantities measured in mesoscopic physics; their violation provides evidence that this device indeed is a source of entangled electrons.Comment: 4 pages, 1 figur

Large-scale collective motion of RFGC galaxies

We processed the data about radial velocities and HI linewidths for 1678 flat edge-on spirals from the Revised Flat Galaxy Catalogue. We obtained the parameters of the multipole components of large-scale velocity field of collective non-Hubble galaxy motion as well as the parameters of the generalized Tully-Fisher relationship in the "HI line width - linear diameter" version. All the calculations were performed independently in the framework of three models, where the multipole decomposition of the galaxy velocity field was limited to a dipole, quadrupole and octopole terms respectively. We showed that both the quadrupole and the octopole components are statistically significant. On the basis of the compiled list of peculiar velocities of 1623 galaxies we obtained the estimations of cosmological parameters Omega_m and sigma_8. This estimation is obtained in both graphical form and as a constraint of the value S_8=sigma_8(Omega_m/0.3)^0.35 = 0.91 +/- 0.05.Comment: Accepted for publication in Astrophysics and Space Scienc

Entanglement Dynamics in Two-Qubit Open System Interacting with a Squeezed Thermal Bath via Quantum Nondemolition interaction

We analyze the dynamics of entanglement in a two-qubit system interacting with an initially squeezed thermal environment via a quantum nondemolition system-reservoir interaction, with the system and reservoir assumed to be initially separable. We compare and contrast the decoherence of the two-qubit system in the case where the qubits are mutually close-by (`collective regime') or distant (`localized regime') with respect to the spatial variation of the environment. Sudden death of entanglement (as quantified by concurrence) is shown to occur in the localized case rather than in the collective case, where entanglement tends to `ring down'. A consequence of the QND character of the interaction is that the time-evolved fidelity of a Bell state never falls below $1/\sqrt{2}$, a fact that is useful for quantum communication applications like a quantum repeater. Using a novel quantification of mixed state entanglement, we show that there are noise regimes where even though entanglement vanishes, the state is still available for applications like NMR quantum computation, because of the presence of a pseudo-pure component.Comment: 17 pages, 9 figures, REVTeX