Dispersion kernels for water wave simulation

We propose a method to simulate the rich, scale-dependent dynamics of water waves. Our method preserves the dispersion properties of real waves, yet it supports interactions with obstacles and is computationally efficient. Fundamentally, it computes wave accelerations by way of applying a dispersion kernel as a spatially variant filter, which we are able to compute efficiently using two core technical contributions. First, we design novel, accurate, and compact pyramid kernels which compensate for low-frequency truncation errors. Second, we design a shadowed convolution operation that efficiently accounts for obstacle interactions by modulating the application of the dispersion kernel. We demonstrate a wide range of behaviors, which include capillary waves, gravity waves, and interactions with static and dynamic obstacles, all from within a single simulation.Funding Sources: European Research Council; Spanish Ministry of EconomyPeer Reviewe

PENGARUH MEDIA PEMBELAJARAN MIND MAPPING TERHADAP MINAT BELAJAR PESERTA DIDIK PADA PELAJARAN EKONOMI KELAS XI IPS 1 di SMA NEGERI 27 BANDUNG

Judul penelitian ini adalah pengaruh media pembelajaran mind mapping terhadap minat belajar peserta didik pada pelajaran ekonomi kelas XI IPS 1 di SMA Negeri 27 Bandung tahun ajaran 2016-2017. Berdasarkan tinjauan langsung di SMA Negeri 27 Bandung kelas XI IPS 1, Pembelajaran konvensional (ceramah) hanya membuat peserta didik kurang aktif dan malas dalam menerima materi yang ada, karena pembelajaran hanya terpusat pada apa yang disampaikan sehingga tidak dapat dimengerti secara maksimal. Tujuan dari penelitian ini adalah: (1) Mengetahui penggunaan media mind mapping pada mata pelajaran ekonomi kelas XI IPS 1 di SMA Negeri 27 Bandung. (2) Mengetahui minat belajar peserta didik pada mata pelajaran ekonomi kelas XI IPS 1 di SMA Negeri 27 Bandung. (3) Mengetahui seberapa besar pengaruh media mind mapping terhadap minat belajar peserta didik pada mata pelajaran ekonomi kelas XI IPS 1 di SMA Negeri 27 Bandung. Metode yang digunakan dalam penelitian ini adalah survei. Teknik pengumpulan data yang digunakan yaitu observasi dan angket dengan teknik pengolahan data uji validitas, uji reliabilitas, uji normalitas data, analisis regresi linier sederhana dan koefisien determinasi, Hipotesis penelitian berbunyi “Terdapat pengaruh antara media pembelajaran mind mapping (X) terhadap minat belajar peserta didik (Y) pada mata pelajaran ekonomi. Hasil penelitian ini adalah terdapat pengaruh antara variabel X dan Variabel Y sebesar 0,336 atau 33,60%. Untuk mengetahui hubungan fungsional antara variabel X dan variabel Y maka digunakan analisis regresi linier sederhana dengan hasil perhitungan sebagai berikut : Y = 9.915 + 0.537 X artinya bahwa setiap media pembelajaran mind mapping bertambah 9,915 maka minat belajar meningkat sebesar 0,537. Untuk mengetahui seberapa besar pengaruh variabel X (media pembelajaran mind mapping) terhadap variabel Y (minat belajar), maka digunakan koefisien determinasi dengan hasil perhitungan sebesar 33,60% maka sebagian lainnya ditentukan oleh faktor lain yang tidak diteliti. Kesimpulan hipotesis penelitian dapat diterima, sebagai akhir penelitian penulis menyampaikan saran kepada guru agar sebaiknya guru menggunakan variasi media pembelajaran yang menarik berkaitan dengan materi pelajaran yang akan disampaikan, karena cara ini dapat membuat peserta didik aktif dan kreatif untuk belajar. Kepada para praktisi atau peneliti lain di bidang pendidikan dapat melakukan penelitian serupa dengan media pembelajaran dan metode yang berbeda agar diperoleh berbagai alternatif untuk peningkatan pemahaman pembelajaran pada pokok bahasan selanjutnya dan kepada pihak sekolah sebagai bahan kajian bagi sekolah dan menyarankan guru untuk menggunakan media pembelajaran yang mampu meningkatkan prestasi belajar peserta didik untuk mendukung pendekatan saintifik dan media pembelajaran yang baik. Kata Kunci : media pembelajaran mind mapping, minat Belajar

Antecedents and consequences of effectuation and causation in the international new venture creation process

The selection of the entry mode in an international market is of key importance for the venture. A process-based perspective on entry mode selection can add to the International Business and International Entrepreneurship literature. Framing the international market entry as an entrepreneurial process, this paper analyzes the antecedents and consequences of causation and effectuation in the entry mode selection. For the analysis, regression-based techniques were used on a sample of 65 gazelles. The results indicate that experienced entrepreneurs tend to apply effectuation rather than causation, while uncertainty does not have a systematic influence. Entrepreneurs using causation-based international new venture creation processes tend to engage in export-type entry modes, while effectuation-based international new venture creation processes do not predetermine the entry mod

Edge computing design space exploration for heart rate monitoring

Edge computing, smart sensors, and health monitoring are boosting current wearable development and enabling the next technological user-centred revolution. Within this context, high added-value applications based on physiological information are gaining attention during the last years. Among the vast physiological metrics available, heart rate variability (HRV) is one of the most used. From such metric, different types of information related to the activity of the autonomic nervous system can be obtained. This fact has led integrated chip manufacturers to foster the design of novel analog front end circuitry for heart rate monitoring, which boosted a wearable smart sensor innovation. Notwithstanding the capabilities and efficiency of these novel sensors, different design space exploration (DSE) procedures must be addressed for every sensor integrated within any wearable system towards maximising the embedded resource usage. On this basis, this paper presents a DSE breakup for every stage involved in a wearable edge device developed by the authors and based on continuous HRV physiological monitoring. The particularities of such a system are detailed and explained. Moreover, time complexity and memory usage comparisons regarding different digital signal processing techniques are provided, which results in a set of potential recommendations for wearable constrained application needs. Finally, a use case is presented based on a rapid stress detection application by using the different DSE recommendations for our specific wearable edge device. This application reaches adequate trade-off precision for detecting physiological HRV activation using only a four-second temporal processing window.Comunidad de Madri

Energy optimization of a light projection system for buildings that virtually restores artworks

Published March 2022: Erratum regarding missing Declaration of Competing Interest statements in previously published articles - Part 1 (Digital Applications in Archaeology and Cultural Heritage, Volume 24, March 2022, Pages e00209). DOI: https://doi.org/10.1016/j.daach.2021.e00209; Erratum incluido en el documentoThe need to achieve energy efficiency standards in the lighting systems of buildings makes it necessary to optimize all aspects of them. Here, the development of a light projection system that achieves this goal by studyingand modifying the spectral output, compared to conventional illumination, is described. A lighting system thatestimates the reflectance characteristics of artwork and emits optimized lighting can reduce light absorption. Adamage-minimizing point-by-point light projection system is developed using an optimization algorithm, toimprove the appearance of the surfaces of artworks whose color has faded. In this case, a simulation of an aged oilpainting was made by manipulating the original photograph, which was printed and to which the proposedsystem was applied. The results show that, when the aged printed image is illuminated with the optimized lightsource, it appears indistinguishable from the non-aged oil painting.This research was supported by project RTI2018-097633-A-I00 from the Spanish Ministry funding "Proyectos I + D Retos de Investigación" entitled Photonic restoration applied to cultural heritage: application to Dali's picture "Dos Figuras

Thermal Decomposition of [AH][M(HCOO)₃] Perovskite-Like Formates

This article belongs to the Special Issue Feature Papers of Solids 2021[Abstract] A systematic study of the thermal decomposition of hybrid perovskites of formula [AH][M(HCOO)₃] under inert atmosphere was performed by means of thermogravimetry and simultaneous infrared spectroscopy of the evolved gases. The influence of: (i) the metal ion of the [M(HCOO)₃]‾ framework and (ii) the guest [AH]⁺ cation, in the composition of the final residue was evaluated. In this work, it has been demonstrated that these materials can be used as precursors of metal or metal-oxide compounds—obtained free of carbon—, and that the composition of the final residue is determined by the standard reduction potential of the metal cation of the framework.This research was funded by Ministerio de Economia y Competitividad MINECO (Spain), grant number FEDER MAT2010-21342-C02-01 and by Xunta de Galicia (Spain), grant number PGIDIT10PXB103272PRXunta de Galicia; PGIDIT10PXB103272P

Quiste hidático de la aurícula derecha, equinococosis pulmonar metastática y corazón pulmonar crónico hidático causado por una obstrucción parasitaria de la arteria pulmonar izquierda y de sus ramas

Presented at session 31th August 1949Presentado en sesión de 31 de agosto de 194

Superconducting Materials Testing with a High-Q Copper RF Cavity

Superconducting RF is of increasing importance in particle accelerators. We have developed a resonant cavity with high quality factor and an interchangeable wall for testing of superconducting materials. A compact TE01 mode launcher attached to the coupling iris selectively excites the azimuthally symmetric cavity mode, which allows a gap at the detachable wall and is free of surface electric fields that could cause field emission, multipactor, and RF breakdown. The shape of the cavity is tailored to focus magnetic field on the test sample. We describe cryogenic experiments conducted with this cavity. An initial experiment with copper benchmarked our apparatus. This was followed by tests with Nb and MgB2. In addition to characterizing the onset of superconductivity with temperature, our cavity can be resonated with a high power klystron to determine the surface magnetic field level sustainable by the material in the superconducting state. A feedback code is used to make the low level RF drive track the resonant frequency

Sensing the fuels: glucose and lipid signaling in the CNS controlling energy homeostasis

The central nervous system (CNS) is capable of gathering information on the body’s nutritional state and it implements appropriate behavioral and metabolic responses to changes in fuel availability. This feedback signaling of peripheral tissues ensures the maintenance of energy homeostasis. The hypothalamus is a primary site of convergence and integration for these nutrient-related feedback signals, which include central and peripheral neuronal inputs as well as hormonal signals. Increasing evidence indicates that glucose and lipids are detected by specialized fuel-sensing neurons that are integrated in these hypothalamic neuronal circuits. The purpose of this review is to outline the current understanding of fuel-sensing mechanisms in the hypothalamus, to integrate the recent findings in this field, and to address the potential role of dysregulation in these pathways in the development of obesity and type 2 diabetes mellitus