Particle approximation for Lagrangian Stochastic Models with specular boundary condition

In this paper, we prove a particle approximation, in the sense of the propagation of chaos, of a Lagrangian stochastic model submitted to specular boundary condition and satisfying the mean no-permeability condition

Mean--field limit of a particle approximation of the one-dimensional parabolic--parabolic Keller-Segel model without smoothing

In this work, we prove the well--posedness of a singularly interacting stochastic particle system and we establish propagation of chaos result towards the one-dimensional parabolic-parabolic Keller-Segel model

Paramagnetic Meissner effect in voltage-biased proximity systems

Conventional superconductors respond to external magnetic fields by generating diamagnetic screening currents. However, theoretical work has shown that one can engineer systems where the screening current is paramagnetic, causing them to attract magnetic flux -- a prediction that has recently been experimentally verified. In contrast to previous studies, we show that this effect can be realized in simple superconductor/normal-metal structures with no special properties, using only a simple voltage bias to drive the system out of equilibrium. This is of fundamental interest, since it opens up a new avenue of research, and at the same time highlights how one can realize paramagnetic Meissner effects without having odd-frequency states at the Fermi level. Moreover, a voltage-tunable electromagnetic response in such a simple system may be interesting for future device design.Comment: Article: 4 pages, 3 figures; Supplemental: 3 pages, no figures

Field-free nucleation of antivortices and giant vortices in non-superconducting materials

Giant vortices with higher phase-winding than $2\pi$ are usually energetically unfavorable, but geometric symmetry constraints on a superconductor in a magnetic field are known to stabilize such objects. Here, we show via microscopic calculations that giant vortices can appear in intrinsically non-superconducting materials, even without any applied magnetic field. The enabling mechanism is the proximity effect to a host superconductor where a current flows, and we also demonstrate that antivortices can appear in this setup. Our results open the possibility to study electrically controllable topological defects in unusual environments, which do not have to be exposed to magnetic fields or intrinsically superconducting, but instead display other types of order.Comment: Revised version; 4 pages manuscript, 4 pages supplemental, 6 figure

Voltage control of superconducting exchange interaction and anomalous Josephson effect

Exerting control of the magnetic exchange interaction in heterostructures is of both basic interest and has potential for use in spin-based applications relying on quantum effects. We here show that the sign of the exchange interaction in a spin-valve, determining whether the ferro- or antiferromagnetic configuration is favored, can be controlled via an electric voltage. This occurs due to an interplay between a nonequilibrium quasiparticle distribution and the presence of spin-polarized Cooper pairs. Additionally, we show that a voltage-induced distribution controls the anomalous supercurrent that occurs in magnetic Josephson junctions, obviating the challenging task to manipulate the magnetic texture of the system. This demonstrates that two key phenomena in superconducting spintronics, the magnetic exchange interaction and the phase shift generating the anomalous Josephson effect, can be controlled electrically. Our findings are of relevance for spin-based superconducting devices which in practice most likely have to be operated precisely by nonequilibrium effects.Comment: 4 pages, 3 figures, 10 subfigures, revised editio

A stable Langevin model with diffusive-reflective boundary conditions

In this note, we consider the construction of a one-dimensional stable Langevin type process confined in the upper half-plane and submitted to reflective-diffusive boundary conditions whenever the particle position hits 0. We show that two main different regimes appear according to the values of the chosen parameters. We then use this study to construct the law of a (free) stable Langevin process conditioned to stay positive, thus extending earlier works on integrated Brownian motion. This construction further allows to obtain the exact asymptotics of the persistence probability of the integrated stable L{\'e}vy process. In addition, the paper is concluded by solving the associated trace problem in the symmetric case

PERAN TENAGA PENDAMPING DESA PADA PELAKSANAAN PROGRAM PEMBAGUNAN DAN PEMBERDAYAAN MASYARAKAT DI DESA WATU KECAMATAN MARIORIWAWO KABUPATEN SOPPENG

Negara Indonesia yang lahir pada 17 Agustus 1945 adalah Negara Kesatuan yang berbentuk Republik. Dalam penyelenggaraan pemerintahannya, Daerah Indonesia terdiri atas beberapa daerah atau wilayah provinsi dan setiap daerah atau wilayah provinsi terdiri atas beberapa daerah kabupaten atau kota. Selanjutnya di dalam tiap daerah kabupaten atau kota terdapat satuan pemerintah terendah yang disebut desa dan kelurahan. Dengan demikian, desa dan kelurahan adalah satuan pemerintahan terendah di bawah pemerintah kabupaten atau kota. Desa adalah kesatuan masyarakat yang memiliki batas wilayah yang berwenang untuk mengatur dan mngurus urusan pemerintahan, pembangunan desa, kepentingan masyarakat setempat berdasarkan prakarsa masyarakat, hak asal usul dan/atau hal tradisional yang diakui dan dihormati dalam sistem pemerintahan negara indonesia. Keberadaan Desa sebagai Lembaga Pemerintahan maupun sebagai entitas kesatuan masyarakat menjadi sangat penting dan strategis. Sebagai Lembaga Pemerintahan, Desa merupakan ujung tombak pemberian layanan kepada masyarakat. Sedangkan sebagai entitas kesatuan masyarakat hukum, Desa merupakan basis sistem kemasyarakatan bangsa indonesia yang sangat kokoh sehingga dapat menjadi landasan yang kuat bagi pengembangan sistem politik, ekonomi, sosial-budaya, dan hankam yang stabil dan dinamis