402 research outputs found

    RANCANG BANGUN SISTEM INFORMASI ADMINISTRASI SURAT MENYURAT KASUBBAG TINGKAT KECAMATAN BERBASIS WEB

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    Kantor Camat Silat Hulu tepatnya di Jl. Jend. Sudirman No.08, merupakan organisasi Pemerintah Daerah Kabupaten kapuas Hulu. Yang mana organisasi tersebut dijalankan oleh aparatur Pemerintah. Kecamatan adalah wilayah kerja Camat sebagai aparatur daerah yang dipimpin oleh Camat yang berada di bawah dan bertanggung jawab kepada Bupati yang memiliki tugas pokok membantu Bupati dalam Penyelenggaraan bidang Pemerintah, bidang Pembangunan dan bidang Pembinaan kehidupan masyarakat. Dimana pada saat ini prosedur yang diterapkan pada pengarsipan surat masuk dan surat keluar pada Kecamatan Silat Hulu mulai dari penerimaan, pembuatan, penyimpanan, pendokumentasian, hingga verifikasi surat, semua dilakukan secara konvensional yang mengakibatkan surat-surat yang ada di Kecamatan silat Hulu tidak termanajemen dengan baik, sangat sulit ketika mencari dokumen-dokumen yang lama karena harus mencari satu persatu. Tujuan mempercepat proses pengarsipan surat masuk dan surat keluar pada Kecamatan Silat Hulu mulai dari penerimaan, pembuatan, penyimpanan, pendokumentasian, hingga verifikasi surat. Untuk metode penelitian yang digunakan yaitu: Pengumpulan data, analisis sistem, perancangan sistem dan implemntasi sistem. Hasil dari penelitian ini diharapkan mampu mempercepat proses pengarsipan surat menyurat yang ada di Kecamatan Silat Hulu

    Metamorphoses of the flow past an obstacle of a resonantly-driven bistable polariton fluid

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    Motivated by recent experiments, we theoretically analyze the flow past an obstacle of a one-dimensional "quantum fluid of light" which is resonantly driven, and exhibits bistability. The flow is found to abruptly change several times when the fluid velocity or the obstacle potential strength are increased. In contrast to the cases of usual fluids and superfluids, the transitions take place between stationary states. They involve the fluid bistability in an essential way. Remarkably, at the transitions points, the fluid in the obstacle wake lies in the unstable intermediate density state

    Bound Pairs of Fronts in a Real Ginzburg-Landau Equation Coupled to a Mean Field

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    Motivated by the observation of localized traveling-wave states (`pulses') in convection in binary liquid mixtures, the interaction of fronts is investigated in a real Ginzburg-Landau equation which is coupled to a mean field. In that system the Ginzburg-Landau equation describes the traveling-wave amplitude and the mean field corrsponds to a concentration mode which arises due to the slowness of mass diffusion. For single fronts the mean field can lead to a hysteretic transition between slow and fast fronts. Its contribution to the interaction between fronts can be attractive as well as repulsive and depends strongly on their direction of propagation. Thus, the concentration mode leads to a new localization mechanism, which does not require any dispersion in contrast to that operating in the nonlinear Schr\"odinger equation. Based on this mechanism alone, pairs of fronts in binary-mixture convection are expected to form {\it stable} pulses if they travel {\it backward}, i.e. opposite to the phase velocity. For positive velocities the interaction becomes attractive and destabilizes the pulses. These results are in qualitative agreement with recent experiments. Since the new mechanism is very robust it is expected to be relevant in other systems as well in which a wave is coupled to a mean field.Comment: 9 pages (RevTex), 9 figures (postscript

    H\"older continuity of the IDS for matrix-valued Anderson models

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    We study a class of continuous matrix-valued Anderson models acting on L^{2}(\R^{d})\otimes \C^{N}. We prove the existence of their Integrated Density of States for any d≥1d\geq 1 and N≥1N\geq 1. Then for d=1d=1 and for arbitrary NN, we prove the H\"older continuity of the Integrated Density of States under some assumption on the group GμEG_{\mu_{E}} generated by the transfer matrices associated to our models. This regularity result is based upon the analoguous regularity of the Lyapounov exponents associated to our model, and a new Thouless formula which relates the sum of the positive Lyapounov exponents to the Integrated Density of States. In the final section, we present an example of matrix-valued Anderson model for which we have already proved, in a previous article, that the assumption on the group GμEG_{\mu_{E}} is verified. Therefore the general results developed here can be applied to this model

    Bridging the complexity gap in Tbps-achieving THz-band baseband processing

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    Recent advances in electronic and photonic technologies have allowed efficient signal generation and transmission at terahertz (THz) frequencies. However, as the gap in THz-operating devices narrows, the demand for terabit-per-second (Tbps)-achieving circuits is increasing. Translating the available hundreds of gigahertz (GHz) of bandwidth into a Tbps data rate requires processing thousands of information bits per clock cycle at state-of-the-art clock frequencies of digital baseband processing circuitry of a few GHz. This paper addresses these constraints and emphasizes the importance of parallelization in signal processing, particularly for channel code decoding. By leveraging structured sub-spaces of THz channels, we propose mapping bits to transmission resources using shorter code words, extending parallelizability across all baseband processing blocks. THz channels exhibit quasi-deterministic frequency, time, and space structures that enable efficient parallel bit mapping at the source and provide pseudo-soft bit reliability information for efficient detection and decoding at the receiver

    Localization for a matrix-valued Anderson model

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    We study localization properties for a class of one-dimensional, matrix-valued, continuous, random Schr\"odinger operators, acting on L^2(\R)\otimes \C^N, for arbitrary N≥1N\geq 1. We prove that, under suitable assumptions on the F\"urstenberg group of these operators, valid on an interval I⊂RI\subset \R, they exhibit localization properties on II, both in the spectral and dynamical sense. After looking at the regularity properties of the Lyapunov exponents and of the integrated density of states, we prove a Wegner estimate and apply a multiscale analysis scheme to prove localization for these operators. We also study an example in this class of operators, for which we can prove the required assumptions on the F\"urstenberg group. This group being the one generated by the transfer matrices, we can use, to prove these assumptions, an algebraic result on generating dense Lie subgroups in semisimple real connected Lie groups, due to Breuillard and Gelander. The algebraic methods used here allow us to handle with singular distributions of the random parameters

    THE DISTURBANCE MODEL AND CONGESTION IN EMERGENCY RESPONSE*

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    Public security agency response to a call for emergency service is a commons good. As consumers demand more of the commons good there is increased congestion. Police services as a commons good are modeled using the uncertainty about which calls for service are bona fide. The results are that optimal alarm systems per officer rise with the officers' wage, fall with the value of avoided losses and rise with the productivity of officers. Ceteris paribus, avoided losses are greater in the community with more alarm systems. Homogeneity of the community increases the optimal number of alarms per officer. Fining 'well-behaved' alarm owners more heavily increases police productivity

    General Reaction-Diffusion Processes With Separable Equations for Correlation Functions

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    We consider general multi-species models of reaction diffusion processes and obtain a set of constraints on the rates which give rise to closed systems of equations for correlation functions. Our results are valid in any dimension and on any type of lattice. We also show that under these conditions the evolution equations for two point functions at different times are also closed. As an example we introduce a class of two species models which may be useful for the description of voting processes or the spreading of epidemics.Comment: 17 pages, Latex, No figure

    Frequency of ischaemic stroke and intracranial haemorrhage in patients with reversible cerebral vasoconstriction syndrome (RCVS) and posterior reversible encephalopathy syndrome (PRES) - A systematic review.

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    BACKGROUND Posterior reversible encephalopathy syndrome (PRES) and reversible cerebral vasoconstriction syndrome (RCVS) may cause ischaemic stroke and intracranial haemorrhage. The aim of our study was to assess the frequency of the afore-mentioned outcomes. METHODS We performed a PROSPERO-registered (CRD42022355704) systematic review and meta-analysis accessing PubMed until 7 November 2022. The inclusion criteria were: (1) original publication, (2) adult patients (≥18 years), (3) enrolling patients with PRES and/or RCVS, (4) English language and (5) outcome information. Outcomes were frequency of (1) ischaemic stroke and (2) intracranial haemorrhage, divided into subarachnoid haemorrhage (SAH) and intraparenchymal haemorrhage (IPH). The Cochrane Risk of Bias tool was used. RESULTS We identified 848 studies and included 48 relevant studies after reviewing titles, abstracts and full text. We found 11 studies on RCVS (unselected patients), reporting on 2746 patients. Among the patients analysed, 15.9% (95% CI 9.6%-23.4%) had ischaemic stroke and 22.1% (95% CI 10%-39.6%) had intracranial haemorrhage. A further 20.3% (95% CI 11.2%-31.2%) had SAH and 6.7% (95% CI 3.6%-10.7%) had IPH. Furthermore, we found 28 studies on PRES (unselected patients), reporting on 1385 patients. Among the patients analysed, 11.2% (95% CI 7.9%-15%) had ischaemic stroke and 16.1% (95% CI 12.3%-20.3%) had intracranial haemorrhage. Further, 7% (95% CI 4.7%-9.9%) had SAH and 9.7% (95% CI 5.4%-15%) had IPH. CONCLUSIONS Intracranial haemorrhage and ischaemic stroke are common outcomes in PRES and RCVS. The frequency reported in the individual studies varied considerably
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