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

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

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

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

Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

Contains fulltext : 172380.pdf (publisher's version ) (Open Access

Pandemia Y filosofía política

Antes que económicos, éticos, o estrictamente sanitarios, los desafíos de la actual coyuntura son, sobre todo, políticos. Los sistemas de salud puestos en tensión, la coordinación entre los múltiples niveles de la gobernanza sanitaria, los planes de urgencia y de prevención que fueron o han debido ser puestos en marcha son todos constructos políticos, el fruto de mecanismos colectivos de decisión, el resultado de un conjunto de elecciones políticas. No basta, sin embargo, con detenernos a auditar un sistema tras un choque planetario, más real que todos los simulacros que hubiéramos podido siquiera imaginar. También nuestra inteligencia colectiva ha sido aporreada. La urgencia y el pánico ante la subestimación de los riesgos y la falta de preparación para ellos han conducido a medidas drásticas, inéditas, que nos han hecho recordar los tiempos más sombríos del siglo XX. Algo ha cambiado radicalmente y todavía no estamos en condiciones de nombrarlo; lo presentimos, evidentemente, lo sabemos en parte en relación con la puesta en cuestión de las certezas y con la obligación de adoptar otras costumbres, otros modos de relacionarnos, otros hábitos de trabajo, de vida y aun de amar a nuestros seres queridos (visitar a nuestros padres, celebrar a nuestros difuntos, etc.)

Tests on MgB2 for application to SRF cavities

Magnesium diboride (MgB2) has a transition temperature (Tc) of ~40 K, i.e., about 4 times higher than niobium (Nb). Studies in the last 3 years have shown that it could have about one order of magnitude less RF surface resistance (Rs) than Nb at 4 K and seems to have much less power dependence than high-Tc materials such as YBCO. However, it was also found that it will depend on the way you deposit the film. The result from on-axis pulsed laser deposition (PLD) showed rapid increase in Rs with higher surface magnetic fields compared to the film deposited with reactive evaporation method

Legal System Voids and Business-Government Ties in an Emerging Market Environment

In this study we develop and test a model investigating how wholly owned foreign subsidiaries (WOFSs) create positive performance outcomes when operating in an emerging market with inherent legal system voids. Our analysis of 181 WOFSs in the Philippines suggests that managerial perceptions of legal system voids are positively related to government relational tie cultivation. Our findings also suggest that the positive relationship between managerial perceptions of legal system voids and government relational tie cultivation is strengthened for WOFSs that are manufacturing intensive. Further, our results suggest that the maintenance of WOFS government relational ties as nonmarket assets mediates the relationship between perceived legal system voids and performance. However, WOFS performance increases with the maintenance of government relational ties up to an inflection point, but then decrease beyond this point as maintenance of government relational ties intensify. Managerial implications and future research directions are offered