Integration of the atmospheric fluctuations in a dual-field optical interferometer: the short exposure regime

Spatial phase-referencing in dual-field optical interferometry is reconsidered. Our analysis is based on the 2-sample variance of the differential phase between target and reference star. We show that averaging over time of the atmospheric effects depends on this 2-sample phase variance (Allan variance) rather than on the true variance. The proper expression for fringe smearing beyond the isoplanatic angle is derived. With simulations of atmospheric effects, based on a Paranal turbulence model, we show how the performances of a dual-field optical interferometer can be evaluated in a diagram 'separation angle' versus 'magnitude of faint object'. In this diagram, a domain with short exposure is found to be most useful for interferometry, with about the same magnitude limits in the H and K bands. With star counts from a Galaxy model, we evaluate the sky coverage for differential astrometry and detection of exoplanets, i.e. likelihood of faint reference stars in the vicinity of a bright target. With the 2mass survey, we evaluate sky coverage for phase-referencing, i.e. avaibility of a bright enough star for main delay tracking in the vicinity of any target direction.Comment: 9 pages, 8 figures, accepted for publication in A&

The Behaviour of Both Listeria monocytogenes and Rat Ciliated Ependymal Cells Is Altered during Their Co-Culture

Ciliated ependymal cells line the cerebral ventricles and aqueducts separating the infected CSF from the brain parenchyma in meningitis

The human nasal mucosa after deprivation of airflow: A study of laryngectomy patients

SUMMAR

Pelatihan Beriventasi Sejak Dini di Pasar Modal

Pasar Modal di Bursa Efek Indonesia (BEI) memudahkan para masyarakat untuk mengelola dananya dipasar modal. Aktivitas di BEI merupakan tempat bertemunya antara Perusahaan yang membutuhkan danadan para investor yang mempunyai dana untuk di investasikan dengan menabung saham. Pelatihan yangdilakukan di Perguruan Advent Bogor merupakan bentuk untuk mengajak Siswa-Siswi, Guru, dan WargaPerguruan Advent Bogor untuk berinvestasi sejak dini yang diprogramkan pemerintah yaitu Yuk NabungSaham. Tujuan khusus dari Pelatihan Kepada Masayarakat adalah Penyampain materi, diskusi dan simulasi.Perguruan Advent Bogor, yang terus berkelanjutan untuk ikut berperan aktif menjadi investor di BursaEfek Jakart

Pemberian Motivasi Cinta Lingkungan Kepada Siswasiswi SMA

Kerusakan kualitas lingkungan disebabkan juga oleh sistem pendidikan yang tidak memperhatikanpendidikan lingkungan terhadap anak didik sejak dini. Tujuan pengabdian kepada masyarakat ini adalahmemberikan motivasi kepada siswa-siswa SMA dalam memelihara lingkungan sejak dini. Metodologi penulisanlaporan ini adalah dengan metode deskriptif. Metode pelaksanaan diawali dengan rapat perencanaan, persiapanbahan, pelaksanaan dan evaluasi. Kegiatan pelaksanaan dilakukan dengan mengumpulkan siswa-siswi SMA dariPerguruan Advent Bogor dalam suatu kelas, lalu diberikan paparan mengapa mereka perlu mencintailingkungan demi generasi mereka sendiri. Perhatian utama yang menjadi acuan adalah lingkungan sungai,karena semua sampah pada akhirnya akan hanyut ke aliran sungai menuju laut. Pemaparan juga mengenaiSungai Citarum yang menjadi perhatian dunia karena sangat kotor dan sampai saat ini belum dapat dibersihkansecara baik. Para peserta, siswa-siswi dan guru-guru, memperhatikan dengan seksama dan banyak bertanyamengenai siapa yang bertanggung jawab mengenai kelestarian lingkungan apakah pemesrintah atau pihaklainnya. Pihak yang terutama menjaga lingkungan adalah diri sendiri agar lingkungan yang bersih dapatdinikmati secara baik sampai dengan generasi yang akan datang

A ~4.6 h quasi-periodic oscillation in the BL Lacertae PKS 2155-304?

We report a possible detection of an ~4.6-hour quasi-periodic oscillation (QPO) in the 0.3-10 keV emission of the high-energy peaked blazar PKS 2155-304 from a 64 ks observation by the XMM-Newton EPIC/pn detector. We identify a total modulation of ~5% in the light curve and confirm that nominal period by periodogram, structure function and wavelet analyses. The limited light curve duration allows the capture of only 3.8 cycles of this oscillation and thus precludes a very strong claim for this QPO, despite a nominally high (>3 sigma) statistical significance. We briefly discuss models capable of producing an X-ray QPO of such a period in a blazar.Comment: 4 pages, 6 figures, accepted for publication in A&A Letter

Explanation and elaboration of the SQUIRE (Standards for Quality Improvement Reporting Excellence) Guidelines, V.2.0: examples of SQUIRE elements in the healthcare improvement literature

Since its publication in 2008, SQUIRE (Standards for Quality Improvement Reporting Excellence) has contributed to the completeness and transparency of reporting of quality improvement work, providing guidance to authors and reviewers of reports on healthcare improvement work. In the interim, enormous growth has occurred in understanding factors that influence the success, and failure, of healthcare improvement efforts. Progress has been particularly strong in three areas: the understanding of the theoretical basis for improvement work; the impact of contextual factors on outcomes; and the development of methodologies for studying improvement work. Consequently, there is now a need to revise the original publication guidelines. To reflect the breadth of knowledge and experience in the field, we solicited input from a wide variety of authors, editors and improvement professionals during the guideline revision process. This Explanation and Elaboration document (E&E) is a companion to the revised SQUIRE guidelines, SQUIRE 2.0. The product of collaboration by an international and interprofessional group of authors, this document provides examples from the published literature, and an explanation of how each reflects the intent of a specific item in SQUIRE. The purpose of the guidelines is to assist authors in writing clearly, precisely and completely about systematic efforts to improve the quality, safety and value of healthcare services. Authors can explore the SQUIRE statement, this E&E and related documents in detail at http://www.squire-statement.org

Long-time Low-latency Quantum Memory by Dynamical Decoupling

Quantum memory is a central component for quantum information processing devices, and will be required to provide high-fidelity storage of arbitrary states, long storage times and small access latencies. Despite growing interest in applying physical-layer error-suppression strategies to boost fidelities, it has not previously been possible to meet such competing demands with a single approach. Here we use an experimentally validated theoretical framework to identify periodic repetition of a high-order dynamical decoupling sequence as a systematic strategy to meet these challenges. We provide analytic bounds-validated by numerical calculations-on the characteristics of the relevant control sequences and show that a "stroboscopic saturation" of coherence, or coherence plateau, can be engineered, even in the presence of experimental imperfection. This permits high-fidelity storage for times that can be exceptionally long, meaning that our device-independent results should prove instrumental in producing practically useful quantum technologies.Comment: abstract and authors list fixe

Hadoop neural network for parallel and distributed feature selection

In this paper, we introduce a theoretical basis for a Hadoop-based neural network for parallel and distributed feature selection in Big Data sets. It is underpinned by an associative memory (binary) neural network which is highly amenable to parallel and distributed processing and fits with the Hadoop paradigm. There are many feature selectors described in the literature which all have various strengths and weaknesses. We present the implementation details of five feature selection algorithms constructed using our artificial neural network framework embedded in Hadoop YARN. Hadoop allows parallel and distributed processing. Each feature selector can be divided into subtasks and the subtasks can then be processed in parallel. Multiple feature selectors can also be processed simultaneously (in parallel) allowing multiple feature selectors to be compared. We identify commonalities among the five features selectors. All can be processed in the framework using a single representation and the overall processing can also be greatly reduced by only processing the common aspects of the feature selectors once and propagating these aspects across all five feature selectors as necessary. This allows the best feature selector and the actual features to select to be identified for large and high dimensional data sets through exploiting the efficiency and flexibility of embedding the binary associative-memory neural network in Hadoop

Ciliary central microtubular orientation is of no clinical significance in bronchiectasis

It has been suggested that patients with bronchiectasis might have increased central microtubular orientation angle (CMOA), which leads to poor coordination of ciliary beating, and consequently impairment of airway defence. We have employed transmission electron microscopy to assess CMOA of ciliated nasal mucosa in a cohort of 133 (81F, 56.8±16.1 yr) stable bronchiectasis and 59 healthy subjects (30F, 49.3±22.1 yr). There was no significant difference in CMOA between bronchiectasis (13.2 degree) and control subjects (13.0 degree, P = 0.82). There was no significant difference in CMOA among patients according to the etiology of bronchiectasis, presence of nasal symptoms, or sputum status of Pseudomonas aeruginosa infection. Patients with more severe bronchiectasis, i.e. those with FEV 1 0.05). CMOA correlated with ciliary beat frequency (negative), and the percent of cilia showing ultrastructural or microtubular defects (P < 0.05). Central microtubular orientation angle does not correlate with clinically important parameters, in contrary to the results reported by previously published smaller scale studies. © 2004 Elsevier Ltd. All rights reserved.postprin