Design of neuro-computing paradigms for nonlinear nanofluidic systems of MHD Jeffery–Hamel flow

© 2018 Taiwan Institute of Chemical Engineers In this paper, a neuro-heuristic technique by incorporating artificial neural network models (NNMs) optimized with sequential quadratic programming (SQP) is proposed to solve the dynamics of nanofluidics system based on magneto-hydrodynamic (MHD) Jeffery–Hamel (JHF) problem involving nano-meterials. Original partial differential equations associated with MHD–JHF are transformed into third order ordinary differential equations based model. Furthermore, the transformed system has been implemented by the differential equation NNMs (DE-NNMs) which are constructed by a defined error function using log-sigmoid, radial basis and tan-sigmoid windowing kernels. The parameters of DE-NNM of nanofluidics system are optimized with SQP algorithm. To illustrate the performance of the proposed system, MHD–JHF models with base-fluid water mixed with alumina, silver and copper nanoparticles for different Hartman numbers, Reynolds numbers, angles of the channel and volume fractions with three different proposed DE-NNMs are designed to evaluate. For comparison purpose, the proposed results with reference numerical solutions of Adams solver illustrate their worth. Statistical inferences through different performance indices are given to demostrate the accuracy, stability and robustness of the stochastic solvers

Multi-messenger observations of a binary neutron star merger

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ~1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of 40+8-8 Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 Mo. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ~40 Mpc) less than 11 hours after the merger by the One- Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transient’s position ~9 and ~16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta

Literasi Laporan Keuangan Bumdes Pada Bumdes Bumi Mulya Desa Gunung Mulya Kecamatan Gunung Sahilan Kabupaten Kampar

BUMDes adalah badan hukum yang didirikan oleh desa dan/atau bersama desa-desa guna mengelola usaha, memanfaatkan aset, mengembangkan investasi dan produktivitas, menyediakan jasa pelayanan, dan/atau menyediakan jenis usaha lainnya untuk sebesar-besarnya kesejahteraan masyarakat desa. Kementerian Desa, Pembangunan Daerah Tertinggal, dan Transmigrasi mencatat hanya ada sekitar 37.000 BUMDes yang aktif dan setelah covid-19 hanya terdapat 10.600 BUMDes saja yang aktif melakukan transaksi atau hanya sekitar 14%. Hal ini disebabkan karena BUMDes yang ada di Indonesia masih banyak menghadapi berbagai permasalahan, salah satunya adalah terbatasnya kemampuan dalam administrasi personel dalam menyusun laporan keuangan BUMDes. Pelaporan keuangan perlu disusun dengan benar dan sesuai agar menghasilkan informasi keuangan yang terpercaya dan relevan sehingga keputusan yang diambil tepat sasaran. Pelaporan keuangan BUMDes sama halnya seperti laporan keuangan entitas profit oriented lainnya. Namun, jika BUMDes masih masuk ke dalam kriteria usaha mikro, kecil dan menengah, maka pelaporan keuangan yang disusun BUMDes harus sesuai dengan Standar Akuntansi Keuangan Entitas Mikro Kecil dan Menengah (SAK-EMKM). Laporan keuangan merupakan output dari tahapan siklus akuntansi yang dimulai dengan tahap pencatatan, penggolongan, pengikhtisaran, dan pelaporan. Pelaporan keuangan yang disusun oleh BUMDes Bumi Mulya masih sederhana dan belum sesuai, sehingga informasi keuangan yang dihasilkan juga belum akuntabel, relevan dan terpercaya. Hal ini dapat menyebabkan para pemangku kepentingan terutama manajemen salah dalam pengambilan keputusan. Literasi laporan keuangan perlu dimiliki oleh personel BUMDes untuk dapat menyusun laporan keuangan yang lebih berkualitas dan informatif, sehingga dapat menjadi salah satu faktor penunjang kemajuan BUMDes di masa yang akan datang. Pengabdian masyarakat ini dilakukan di Kantor BUMDes Bumi Mulya Desa Gunung Mulya Kecamatan Gunung Sahilan Kabupaten Kampar yang dihadiri oleh para pengurus BUMDes yang terdiri dari direktur, sekretaris, bendahara, staf dan tokoh masyarakat lainnya. Kegiatan ini juga melibatkan mahasiswa dengan tujuan untuk memberikan pengalaman dan meningkatkan pemahaman mahasiswa mengenai literasi laporan keuangan BUMDes. Pelaksanaan pengabdian mendapatkan respon yang positif dari para peserta karena memudahkan pengurus BUMDes dalam memahami literasi laporan keuangan BUMDes agar menghasilkan laporan keuangan yang lebih memadai

A facile co-precipitation synthesis of heterostructured ZrO2|ZnO nanoparticles as efficient photocatalysts for wastewater treatment

Gnm3Altres ajuts: Basque Government ELKARTEK, FN KK-2015/0010ZrO₂-decorated ZnO (ZrO₂/ZnO) nanoparticles (NPs) have been synthesized by a facile co-precipitation method in the presence of cetyltrimethylammonium bromide (CTAB) surfactant. The ZrO₂ amount in the NPs has been varied from 1.0, 2.0, 4.9, to 9.3% by weight. The resulting NPs are heterostructured and consist of a crystalline ZnO core (wurtzite phase) surrounded by an amorphous ZrO₂ layer. X-ray diffraction analyses support this observation. The NPs show a narrow size distribution and are slightly elongated. Compared to pure ZnO NPs, the hybrid ZrO₂/ZnO ones show enhanced photocatalytic activity toward the degradation of Rhodamine B under UV-Vis light. Such enhancement has been partly attributed to the increased amount of oxygen vacancies when ZrO₂ is incorporated into the NPs, as shown by X-ray photoelectron spectroscopy analyses