Abstract
We discuss the concept of FPGA-unfriendliness, the property of certain algorithms, programs, or domains which may limit their applicability to FPGAs. Specifically, we look at graph analysis, which has recently seen increased interest in combination with High-Level Synthesis, but has yet to find great success compared to established acceleration mechanisms. To this end, we make use of Xilinx's Vitis Graph Library to implement Single-Source Shortest Paths (SSSP) and PageRank (PR), and present a custom kernel written from the ground up for Distinctiveness Centrality (DC, a novel graph centrality measure). We use public datasets to test these implementations, and analyse power consumption and execution time. Our comparisons against published data for GPU and CPU execution show FPGA slowdowns in execution time between around 18.5x and 328x for SSSP, and around 1.8x and 195x for PR, respectively. In some instances, we obtained FPGA speedups versus CPU of up to 2.5x for PR. Regarding DC, results show speedups from 0.1x to 3.5x, and energy efficiency increases from 0.8x to 6x. Lastly, we provide some insights regarding the applicability of FPGAs in FPGA-unfriendly domains, and comment on the future as FPGA and HLS technology advances.

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Abstract

Abstract
O mindfulness, enquanto processo psicológico, tem sido alvo de um interesse crescente por parte da investigação científica. O objetivo do presente estudo foi o de examinar a confiabilidade, validade fatorial e medição da invariância (fumadores e não fumadores) de uma versão portuguesa da Philadelphia Mindfulness Scale (PHLMS). Na pesquisa participaram 315 adultos portugueses entre os 18 e os 62 anos (M = 23.14; DP = 7.286), sendo 110 fumadores e 205 não fumadores. A confiabilidade para a dimensão consciência foi de .861 e de .868 para a subescala aceitação. A análise fatorial confirmatória apresentou um modelo ajustado a dois fatores sem necessidade de eliminação de itens. A análise multigrupos suportou a invariância do instrumento entre fumadores e não fumadores. Os resultados evidenciam boas propriedades psicométricas para a utilização da PHLMS no contexto de investigação em amostras de adultos portugueses.

Abstract

Abstract
Phubbing, the act of ignoring someone to use the smartphone, has been a concern because of its consequences on social interaction. The present study aims to verify the phubbing practice's impact on satisfaction with a loving relationship and intimacy. This study was a quasi-experimental, cross-sectional, and quantitative study. The sample consisted of 384 individuals, 255 women, and 129 men. A sociodemographic questionnaire and instruments were applied Phubbing Scale (PS), Mobile Phone Usage Addiction Scale (MPUAS), Internet Addiction Scale (IAS), Social Media Addiction Scale (SMAS), Game Addiction Scale (GAS), SMS Addiction Scale (SAS), Relationship Assessment Scale (RAS) and Psychological Intimacy Scale (PIS). The statistical program used for data analysis was the Statistical Package for the Social Sciences (SPSS). The only dimensions of phubbing that influenced satisfaction with the love relationship were the communication disturbance, and in women, the difficulties of controlling the smartphone's use, and the need to share on social media. Results showed that: 1- satisfaction with the relationship is associated with the levels of intimacy. Another finding was that intimacy is related to a communication disturbance and phone obsession in women and difficulties in controlling smartphone use in men. © 2021