Neighbourhood mobility in context : household moves and changing neighbourhoods in the Netherlands

Although high levels of population mobility are often viewed as a problem at the neighbourhood level we know relatively little about what makes some neighbourhoods more mobile than others. The main question in this paper is to what extent differences in out-mobility between neighbourhoods can be explained by differences in the share of mobile residents, or whether other neighbourhood characteristics also play a role. To answer this question we focus on the effects of the socioeconomic status and ethnic composition of neighbourhoods and on neighbourhood change. Using data from the Netherlands population registration system and the Housing Demand Survey we model population mobility both at individual and at neighbourhood levels. The aggregate results show that the composition of the housing stock and of the neighbourhood population explain most of the variation in levels of neighbourhood out-mobility. At the same time, although ethnic minority groups in the Netherlands are shown to be relatively immobile, neighbourhoods with higher concentrations of ethnic minority residents have the highest population turnovers. The individual-level models show that people living in neighbourhoods which experience an increase in the percentage of ethnic minorities are more likely to move, except when they belong to an ethnic minority group themselves. The evidence suggests that 'white flight' and 'socio-economic flight' are important factors in neighbourhood change.PostprintPeer reviewe

Search for Sterile Neutrinos with a Radioactive Source at Daya Bay

The far site detector complex of the Daya Bay reactor experiment is proposed as a location to search for sterile neutrinos with > eV mass. Antineutrinos from a 500 kCi 144Ce-144Pr beta-decay source (DeltaQ=2.996 MeV) would be detected by four identical 20-ton antineutrino targets. The site layout allows flexible source placement; several specific source locations are discussed. In one year, the 3+1 sterile neutrino hypothesis can be tested at essentially the full suggested range of the parameters Delta m^2_{new} and sin^22theta_{new} (90% C.L.). The backgrounds from six nuclear reactors at >1.6 km distance are shown to be manageable. Advantages of performing the experiment at the Daya Bay far site are described

Analisis Kesiapan Sumber Daya Manusia Pada Kontraktor Di Surabaya Menghadapi Masyarakat Ekonomi ASEAN

Penelitian ini dilakukan untuk mengetahui kesiapan sumber daya manusia pada kontraktor di Surabaya dalam menghadapi Masyarakat Ekonomi ASEAN (MEA), terutama para tenaga kerja yang berada di Surabaya. Ketersediaan jumlah sumber daya manusia yang cukup banyak di Indonesia membuat aspek tersebut merupakan salah satu bagian yang perlu diperhatikan dalam menghadapi MEA. Dengan berlangsungnya MEA di negara-negara ASEAN maka aliran bebas tenaga kerja antar negara ASEAN akan semakin mudah dikarenakan dibebaskannya biaya pembuatan visa dan employment pass. Akibatnya, hal tersebut dapat memunculkan persaingan antara tenaga kerja lokal dengan tenaga kerja asing untuk mendapatkan lapangan pekerjaan di Indonesia.Hasil penelitian menunjukkan bahwa 75% tenaga kerja belum siap secara administratif untuk menghadapi MEA yang akan berlaku mulai pada akhir tahun 2015 ini. Ketidaksiapan tersebut berupa ketidaklulusan syarat untuk mendaftar sebagai anggota ASEAN Chartered Professional Engineer (ACPE) sesuai dengan MRA on Engineering Services. Selain itu unit kompetensi yang perlu ditingkatkan bagi para tenaga kerja kontraktor di Surabaya adalah Manajemen Keselamatan Kesehatan Kerja dan Manajemen Lingkungan

Relaxed disk packing

Motivated by biological questions, we study configurations of equal-sized disks in the Euclidean plane that neither pack nor cover. Measuring the quality by the probability that a random point lies in exactly one disk, we show that the regular hexagonal grid gives the maximum among lattice configurations

Bubble formation in ϕ6\phi^6 potential

Scalar field theory with an asymmetric potential is studied at zero temperature and high-temperature for $\phi^6$ potential. The equations of motion are solved numerically to obtain O(4) spherical symmetric and O(3) cylindrical symmetric bounce solutions. These solutions control the rates for tunneling from the false vacuum to the true vacuum by bubble formation. The range of validity of the thin-wall approximation (TWA) is investigated. An analytical solution for the bounce is presented, which reproduces the action in the thin-wall as well as the thick-wall limits.Comment: 22 pag

Neutral Higgs bosons in the MNMSSM with explicit CP violation

Within the framework of the minimal non-minimal supersymmetric standard model (MNMSSM) with tadpole terms, CP violation effects in the Higgs sector are investigated at the one-loop level, where the radiative corrections from the loops of the quark and squarks of the third generation are taken into account. Assuming that the squark masses are not degenerate, the radiative corrections due to the stop and sbottom quarks give rise to CP phases, which trigger the CP violation explicitly in the Higgs sector of the MNMSSM. The masses, the branching ratios for dominant decay channels, and the total decay widths of the five neutral Higgs bosons in the MNMSSM are calculated in the presence of the explicit CP violation. The dependence of these quantities on the CP phases is quite recognizable, for given parameter values.Comment: 25 pages, 8 figure