Spectral averaging techniques for Jacobi matrices

Spectral averaging techniques for one-dimensional discrete Schroedinger operators are revisited and extended. In particular, simultaneous averaging over several parameters is discussed. Special focus is put on proving lower bounds on the density of the averaged spectral measures. These Wegner type estimates are used to analyze stability properties for the spectral types of Jacobi matrices under local perturbations

Tugas Dan Fungsi Lembaga Swadaya Masyarakat Dalam Melindungi Konsumen

Penelitian ini dilakukan untuk mengetahui bagaimana tujuan dan fungsi Lembaga Swadaya Masyarakat dalam melindungi hak konsumen menurut peraturan Perundang-undangan yang berlaku di Indonesia dan bagaimana pelaksanaan tujuan dan fungsi Lembaga Swadaya Masyarakat dalam melindungi hak konsumen di Indonesia. Dengan menggunakan metode penelitian hukum normatif sebagai metode penelitian yang digunakan penulis untuk menyusun karya tulis ini dan dapat disimpulkan, bahwa: 1. Lembaga Perlindungan Konsumen Swadaya Masyarakat tujuan pembentukannya yaitu untuk meningkatkan partisipasi masyarakat dalam upaya perlindungan konsumen karena tanggung jawab untuk melindungi hak-hak konsumen merupakan kewajiban pemerintah dan masyarakat, sedangkan fungsinya atau tugasnya menurut peraturan Perundang-undangan yang berlaku di Indonesia yaitu menyebarkan informasi dalam rangka meningkatkan kesadaran atas hak dan kewajiban dan kehati-hatian konsumen dalam mengkonsumsi barang dan/atau jasa; memberikan nasihat kepada konsumen yang memerlukannya; bekerja sama dengan instansi terkait dalam upaya mewujudkan perlindungan konsumen; membantu konsumen dalam memperjuangkan haknya, termasuk menerima keluhan atau pengaduan konsumen; melakukan pengawasan bersama pemerintah dan masyarakat terhadap pelaksanaan perlindungan konsumen. 2. Pelaksanaan Tujuan dan Fungsi Lembaga Perlindungan Konsumen Swadaya Masyarakat dalam melindungi hak konsumen di Indonesia telah dilaksanakan sebagaimana diatur dalam ketentuan-ketentuan peraturan Perundang-undangan terutama berkaitan dengan pengawasan terhadap barang dan jasa yang digunakan oleh konsumen. Hal ini dilakukan bekerjsama dengan pemerintah dan hasil pengawasan tersebut merupakan bahan masukan bagi aparat penegak hukum dan Lembaga Penyelesaian Sengketa Konsumen untuk menyelesaian kasus-kasus pelanggaran hak konsumen baik melalui pengadilan maupun di luar pengadilan

Likelihood-based assessment of dynamic networks

This paper deals with the problem of assessing probabilistic models that represent the evolution of a target graph. Such models have long been a topic of interest for a number of networks, especially communications networks. The solution developed in this paper gives a rigorous way to calculate the likelihood of the observed graph evolution having arisen from a wide variety of hypothesized models encompassing many already present in the literature. The framework is shown to recover parameters from artificial data and is tested on real data sets from Facebook and from emails from the company Enron

World Health Organisation test applied on Culicoides: a multicentric study

The aim of this work is to organize a multicentric assay to compare susceptibilities of Culicoides populations to insecticides (i.e. C. imicola and C. obsoletus sensu stricto). The base line of the World Health Organisation test kit (WHO/VBC81.805) is to expose mosquitoes to papers impregnated with insecticides to detect the resistance of Anopheles (paludism vector) in the field. In a novel approach, the WHO test can be used on Culicoides to assess midges' susceptibility to insecticides. Information on the intrinsic susceptibilities to insecticides is required to assess correctly the existing (or new) formulations of insecticide. This multicentric assay will improve our capacity to experiment by networking and assess the population variability by comparing susceptibilities between different populations of Culicoides. Field-collected midges are trapped alive using an ultraviolet light trap (OVI model, South Africa) and replacing the collection jar with a fine mesh cage. To prevent desiccation, cages are covered with wet papers, wrapped in aluminium foil and retrieved at dawn. It is important to choose the site and period with abundant target species to improve robustness with more individuals. Experiments should be carried out in an insecticide-free environment with constant temperature and humidity, and started a few hours after collection. Insecticide-impregnated papers are rolled and fastened into the WHO kit test tube. About 30 Culicoides (approximately 20 nulliparous females) are collected and transferred to the tube. Tubes are maintained horizontally for an hour (exposure to insecticide). Mortalities are recorded 1 h and 24 h after exposure. One control is performed without insecticide to validate the test. Mortalities are analysed by probit regression to obtain LC50 and LC90 for each population. The test has to be run at least with four concentrations of insecticide, one control and four replicates with samples from the same population. Only nulliparous females are recorded. Insecticide concentrations are given in percentages (WHO standard). In this WHO test, the target species are C. imicola and C. obsoletus s.s., and the active ingredient used is deltamethrin at doses 0.005, 0.001, 0.0005 and 0.0001%. Data will be centralized and analysed by EID-Méditerranée (France), and results will be given back to the partners and published. Future studies could focus on comparing the four deltamethrin concentrations on other species and testing Culicoides susceptibility to other components. (Texte intégral

ATRA mechanically reprograms pancreatic stellate cells to suppress matrix remodelling and inhibit cancer cell invasion

Pancreatic ductal adenocarcinoma (PDAC) is a highly aggressive malignancy with a dismal survival rate. Persistent activation of pancreatic stellate cells (PSCs) can perturb the biomechanical homoeostasis of the tumour microenvironment to favour cancer cell invasion. Here we report that ATRA, an active metabolite of vitamin A, restores mechanical quiescence in PSCs via a mechanism involving a retinoic acid receptor beta (RAR-β)-dependent downregulation of actomyosin (MLC-2) contractility. We show that ATRA reduces the ability of PSCs to generate high traction forces and adapt to extracellular mechanical cues (mechanosensing), as well as suppresses force-mediated extracellular matrix remodelling to inhibit local cancer cell invasion in 3D organotypic models. Our findings implicate a RAR-β/MLC-2 pathway in peritumoural stromal remodelling and mechanosensory-driven activation of PSCs, and further suggest that mechanical reprogramming of PSCs with retinoic acid derivatives might be a viable alternative to stromal ablation strategies for the treatment of PDAC

Pengaruh Kebiasaan Belajar, Persepsi Siswa Tentang Fasilitas Belajar, Dan Interaksi Sosial Teman Sebaya Terhadap Prestasi Belajar Siswa Pada Mata Pelajaran Akutansi Kelas X1 IPS MAN 02 Batu

Penelitian ini bertujuan untuk mengetahui pengaruh kebiasaan belajar, persepsi siswa tentang fasilitas belajar, dan interaksi sosial teman sebaya terhadap prestasi belajar siswa pada mata pelajaran akuntansi. Penelitian ini tergolong dalam penelitian eksplanatori. Populasi penelitian ini adalah seluruh siswa kelas XI IPS MAN 02 Batu sejumlah 132 siswa dan dengan teknik proportional random sampling digunakan sampel sejumlah 57 siswa. Metode pengumpulan data menggunakan angket untuk mengukur kebiasaan belajar, persepsi siswa tentang fasilitas belajar, dan interaksi sosial teman sebaya, sedangkan dokumentasi untuk mengambil data prestasi belajar akuntansi. Analisis data yang digunakan adalah analisis regresi linier berganda dengan pengujian hipotesis menggunakan uji t dengan bantuan program SPSS 22 for windows

Stanilov-Tsankov-Videv Theory

We survey some recent results concerning Stanilov-Tsankov-Videv theory, conformal Osserman geometry, and Walker geometry which relate algebraic properties of the curvature operator to the underlying geometry of the manifold.Comment: This is a contribution to the Proceedings of the 2007 Midwest Geometry Conference in honor of Thomas P. Branson, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA

What is Localization?

We examine various issues relevant to localization in the Anderson model. We show there is more to localization than exponentially localized states by presenting an example with such states but where ⟨x(t)^2⟩/t^(2 − δ) is unbounded for any δ > 0. We show that the recently discovered instability of localization under rank one perturbations is only a weak instability

Penaksir Rasio yang Efisien untuk Variansi Populasi pada Sampling Acak Sederhana Menggunakan Fraksi Pengambilan Sampel

The estimators studied here are three ratio estimators for population variance in simple random sampling without replacement using sampling fraction. This study is a review of article written by Tailor and Sharma [Statistics in Transition-new series 13 (2012): 37-46]. All estimators are biased, then their mean square error (MSE) of the studied estimators are compared to obtain the most efficient estimator. An example is given to explain the studied problem