2020
Authors
Marques, A; Soares, R; Santos, MJ; Amorim, P;
Publication
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
Abstract
This paper addresses the integration of the planning decisions concerning inbound logistics in an industrial setting (from the suppliers to the mill) and outbound logistics (from the mill to customers). The goal is to find the minimum cost routing plan, which includes the cost-effective outbound and inbound daily routes (OIRs), consisting of a sequence of deliveries of customer orders, pickup of a full truck-load at a supplier, and its delivery to the mill. This study distinguishes between three planning strategies: opportunistic backhauling planning (OBP), integrated inbound and outbound planning (IIOP) and decoupled planning (DIOP), the latter being the commonly used, particularly in the case of the wood-based panel industry under study. From the point of view of process integration, OBP can be considered as an intermediate stage from DIOP to IIOP. The problem is modelled as a Vehicle Routing Problem with Backhauls, enriched with case-specific rules for visiting the backhaul, split deliveries to customers and the use of a heterogeneous fleet. A new fix-and-optimise matheuristic is proposed for this problem, seeking to obtain good quality solutions within a reasonable computational time. The results from its application to the wood-based panel industry in Portugal show that IIOP can help to reduce total costs in about 2.7%, when compared with DIOP, due to better use of the delivery truck and a reduction of the number of dedicated inbound routes. Regarding OBP, fostering the use of OIRs does not necessarily lead to better routing plans than DIOP, as it depends upon a favourable geographical configuration of the set of customers to be visited in a day, specifically, the relative distance between a linehaul that can be visited last in a route, a neighboring backhaul, and a mill. The paper further provides valuable managerial insights on how the routing plan is impacted by the values of business-related model parameters which are set by the planner with some degree of uncertainty. Results suggest that increasing the maximum length of the route will likely have the largest impact in reducing transportation costs. Moreover, increasing the value of a reward paid for visiting a backhaul can foster the percentage of OIR in the optimal routing plan.
2020
Authors
Brandao, A; Resende, JS; Martins, R;
Publication
TRUST, PRIVACY AND SECURITY IN DIGITAL BUSINESS, TRUSTBUS 2020
Abstract
Over the last years, it has become clear that online games are one of the most used applications on the Internet. This increasing popularity has attracted an influx of players, with some of them trying to gain an unfair advantage for economic reasons, e.g., eSports tournaments, through the use of cheats and exploits. From a different perspective, it is of utmost importance to start analyzing attacks from a defensive perspective to create novel mechanisms that can stop such behaviors. In this work, we introduce a novel solution that extends current anti-cheat solutions through Intel SGX. Our solution moves the core cheat detection engine to a secure enclave provided by SGX while making use of a kernel module for the necessary primitives for system-wide protection. With this, we can prevent client-side tampering in both game code and configuration data by creating a trusted execution environment isolated from the hosting operating system. We are making it capable of preventing the attacker from modifying the cheat detection engine and associated game files. This solution blocks known attacks in games such as CS:GO while maintaining the performance, ensuring gameplay integrity and fairness.
2020
Authors
Valiente, D; Berenguer, Y; Paya, L; Fonseca Ferreira, NMF; Reinoso, O;
Publication
ROBOTICS IN EDUCATION: CURRENT RESEARCH AND INNOVATIONS
Abstract
Mobile robotics has become an essential content in many subjects within most Bachelor's and Master's degrees in engineering. Visual sensors have emerged as a powerful tool to perform reliable localization and mapping tasks for a mobile robot. Moreover, the use of images permits achieving other high level tasks such as object and people detection, recognition, or tracking. Nonetheless, our teaching experience confirms that students encounter many difficulties before dealing with visual localization and mapping algorithms. Initial stages such as data acquisition (images and trajectory), preprocessing or visual feature extraction, usually imply a considerable effort for many students. Consequently, the teaching process is prolonged, whereas the active learning and the students' achievement are certainly affected. Considering these facts, we have implemented a Matlab software tool to generate an open variety of virtual environments. This allows students to easily obtain synthetic raw data, according to a predefined robot trajectory inside the designed environment. The virtualization software also produces a set of images along the trajectory for performing visual localization and mapping experiments. As a result, the overall testing procedure is alleviated and students report to take better advantage of the lectures and the practical sessions, thus demonstrating higher achievement in terms of comprehension of fundamental mobile robotics concepts. Comparison results regarding the achievement of students, engagement, satisfaction and attitude to the use of the tool, are presented.
2020
Authors
Pinho, D; Aguiar, A;
Publication
EuroPLoP
Abstract
Communication is crucial in agile contexts due to the need for collaboration and the number of different people involved, ranging from developers to users and business people. This communication should be effective to ensure everyone is on the same page; otherwise it can lead to undesired results such as misunderstanding and loss of productivity. As such, there is a need to ensure good communication in agile contexts. This paper presents a pattern language to tackle this issue, alongside with the patterns of a section of the language. The pattern language aims to provide a set of practices that help with recurrent problems and increase the effectiveness of communication. The patterns presented in this paper (Information Radiators, Co-Located Team, Open Space, Informal Communication Space and Cubes) address the issues related with the physical environment surrounding an agile team. © 2020 ACM.
2020
Authors
Yakneen, S; Waszak, SM; Yakneen, S; Aminou, B; Bartolome, J; Boroevich, KA; Boyce, R; Brooks, AN; Buchanan, A; Buchhalter, I; Butler, AP; Byrne, NJ; Cafferkey, A; Campbell, PJ; Chen, Z; Cho, S; Choi, W; Clapham, P; Davis Dusenbery, BN; De La Vega, FM; Demeulemeester, J; Dow, MT; Dursi, LJ; Eils, J; Eils, R; Ellrott, K; Farcas, C; Favero, F; Fayzullaev, N; Ferretti, V; Flicek, P; Fonseca, NA; Gelpi, JL; Getz, G; Gibson, B; Grossman, RL; Harismendy, O; Heath, AP; Heinold, MC; Hess, JM; Hofmann, O; Hong, JH; Hudson, TJ; Hutter, B; Hutter, CM; Hübschmann, D; Imoto, S; Ivkovic, S; Jeon, SH; Jiao, W; Jung, J; Kabbe, R; Kahles, A; Kerssemakers, JNA; Kim, HL; Kim, H; Kim, J; Kim, Y; Kleinheinz, K; Koscher, M; Koures, A; Kovacevic, M; Lawerenz, C; Leshchiner, I; Liu, J; Livitz, D; Mihaiescu, GL; Mijalkovic, S; Mijalkovic Lazic, A; Miyano, S; Miyoshi, N; Nahal Bose, HK; Nakagawa, H; Nastic, M; Newhouse, SJ; Nicholson, J; O’Connor, BD; Ocana, D; Ohi, K; Ohno Machado, L; Omberg, L; Ouellette, BFF; Paramasivam, N; Perry, MD; Pihl, TD; Prinz, M; Puiggròs, M; Radovic, P; Raine, KM; Rheinbay, E; Rosenberg, M; Royo, R; Rätsch, G; Saksena, G; Schlesner, M; Shorser, SI; Short, C; Sofia, HJ; Spring, J; Stein, LD; Struck, AJ; Tiao, G; Tijanic, N; Torrents, D; Van Loo, P; Vazquez, M; Vicente, D; Wala, JA; Wang, Z; Waszak, SM; Weischenfeldt, J; Werner, J; Williams, A; Woo, Y; Wright, AJ; Xiang, Q; Yang, L; Yuen, D; Yung, CK; Zhang, J; Korbel, JO; Gertz, M; Korbel, JO;
Publication
Nature Biotechnology
Abstract
This paper was originally published under standard Springer Nature copyright (© The Author(s), under exclusive licence to Springer Nature America, Inc.). It is now available as an open-access paper under a Creative Commons Attribution 4.0 International license. © 2020, The Author(s).
2020
Authors
Lopes, DF; Simões, M; Sampaio, G; Rua, D; Machado, P; Bessa, R; André, R; Moreira, J; Abreu, C; Madureira, A;
Publication
IET Conference Publications
Abstract
This study presents Integrid’s project framework to manage low voltage (LV) electrical networks, aiming to avoid both technical and quality constraints, induced by the ever-increasing amount of flexible resources spread all over the grid. These assets cover a large amount of renewable-based energy generation to electrical vehicles and energy storage units. For this to be possible, new advanced tools were developed to exploit the benefits of the so-called distributed energy resources, while overcoming limitations on the metering and communication infrastructures. Hence, this study describes the approach taken to perform the active management of LV networks, without a perfect level of observability, exploiting the flexibility provided by the distribution system operator’s resources combined with the one offered by private consumers through the home energy management systems. Additionally, some results followed by a brief discussion are presented, enforcing the success of the developed tools. The algorithms within these tools allow to forecast both microgeneration, available flexibility and load profiles, as well as to estimate the network’s state, at different time frames.
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