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A User Experience Study on the Design Direction for Foreigner-Friendly Telecommunication Service in South Korea
Get PDFAs South Korea experiences an increase in cultural and ethnic diversity, telecommunication companies have recognized the need to provide online service channels, such as mobile applications and websites, that are tailored to the needs of this growing segment of users. Despite efforts by some companies to be more inclusive in their design, including the provision of separate translated webpages, non-native customers still encounter obstacles when utilizing telecom services, resulting in a suboptimal user experience and limited accessibility. Therefore, a systematic study is required to gain a deeper understanding of the needs and challenges faced by foreign users when purchasing and using telecommunication services. This study includes case studies and reviews of existing services, user experience research through focus group, in-depth and expert interviews, this study aims to suggest a direction for designing mobile telecommunication service targeting foreigners in South Korea. Ultimately, the findings of this study are expected to be practically used as a resource for designing “foreigner-friendly” telecommunication services that promotes equal accessibility to information and support
How the COVID-19 changed the urban mobility ecosystem: A perspective for new hybrid services
Get PDFThe unfettered expansion of cities is pushing our environment to the brink, as it faces a slew of unprecedented challenges that are intensifying the already critical issue of climate change. Part of the responsibility is due to the high carbon emissions generated by transport, rising demand for transportation, and an increased digitalized world where e-commerce grows. Mobility patterns changed during the last two and a half years due to the pandemic restrictions and consequent lifestyle changes. This paper focuses on a study in the city of Porto, Portugal. It contributes to an understanding of the main changes in frequency and mobility choices and urban mobility trends for this sector, focusing on sustainable urban mobility. In addition, it seeks to bring the service design lens to the analysis and visualization of the interactions of mobility services before and during the pandemic and propose solutions for a hybrid context characterized by cycles of restrictions and flexibilization of sanitary measures. The findings are a launching pad to implement new business models focused on sustainable new hybrid services
Wicked Strategies: Comparing Evolved Double Diamond and PPG’s Framework for Strategy Creation for Wicked Problems in Service Design
Get PDFWicked problems are present in many of the services that service designers design as in healthcare, social work or sustainable transportation. Camillus (2008) argued that wicked problems often increase as an organisation faces constant change or unprecedented challenges. These challenges need models on how to tackle them and in this article we will compare the Evolved Double Diamond model with PPG Industries’ framework for responding to wicked problems, as presented by Camillus (2008). Both models are used to create a strategy for the context of wicked problems: a new Evolved Double Diamond model that addresses especially complex problems. It is good to look at models critically and understand their similarities and differences for possible future development of strategies
In-Depth System-Level Energy Analysis of Hybrid Electrified Commuter Aircraft for Improved Energy Efficiency
Get PDFThis work presents a comprehensive analysis of hybrid electric propulsion systems in commuter aircraft, aimed at enhancing energy efficiency. The study utilizes an aircraft conceptual design library, OpenConcept, to perform evaluations of various aircraft components and their interrelationships. The methodology integrates aerodynamics, propulsion, and mission analysis within a common framework to optimize the aircraft design. The analysis focuses on a 19-passenger commuter aircraft, employing a series/parallel hybrid-electric architecture. The gradient-based Sequential Least Squares Programming optimizer is utilized to optimize design variables such as battery weight, engine power, and the selected power ratios, while adhering to operational constraints. Through a rigorous Design of Experiments study, the paper highlights that even when considering the current battery technology, hybrid-electric propulsion yields substantial energy savings for short-haul missions. The fuel and energy consumption reductions are evident, particularly for shorter ranges. However, for extended missions, the critical role of advanced battery energy density is emphasized to achieve significant energy efficiency improvements
An embedded industrial control framework for model predictive control of district heat substation
No full textIn this paper we present a standard platform XC05 for an Edge Controller based on an Industrial Control System, where functions made in Modelica and Python can be run as an integrated part of an automation system. We demonstrate how the platform is used to run a complex Model Predictive Control (MPC) strategy to optimize indoor heating in a residential building. MPC strategies have been increasingly popular due to their ability to handle nonlinear dynamics with constraints and multi-objective optimization. Since industrial control systems are real-time based, consideration must also be taken to running security and the real-time characteristics and timing of the overall system solution. We also show that heavy calculation, protected by the industrial control system operative, can run safely together within fast automation using standard electronics. The controlled variable in the MPC strategy is the supply water temperature (Space heating), and the objective is to keep the indoor temperature at a predefined setpoint despite variations in outdoor weather conditions by using local measurements and weather forecasts from the Swedish weather service SMHI. The model used in the MPC is trained automatically with real-time data during running. We describe the controller architecture and briefly the model predictive control algorithm, analyze the overall system performance regarding safety and real-time characteristics. The proposed model predictive control application showed stable operation and expected real-time characteristics during operation. Furthermore, a reduction in indoor temperature deviations was achieved
Vad motiverar frivilliga att fortsätta vara frivilliga?
No full textOrganiserade frivilliga är en allt viktigare del av samhällets beredskap. Initiativ som Sms-livräddare och Civila Insatspersoner (CIP) kan stötta professionella responsorganisationer och möjliggöra snabbare respons till händelser som hjärtstopp eller mindre bränder. Att få personer att ställa upp som frivilliga och sedan fortsätta vara frivilliga är väsentligt för att dessa initiativ ska ha en samhällsnytta. Tidigare studier har visat att det finns många faktorer som motiverar personer att bli frivilliga. Det saknas dock forskning på vilka faktorer som är mest avgörande för att personer ska fortsätta vara engagerade som frivilliga.
Därför genomfördes våren 2022 en enkätstudie av forskare inom Centrum för Forskning i Respons- och Räddningssystem (CARER), där 5 300 personer som var engagerade antingen som Sms-livräddare eller CIP:ar svarade på frågor om vad som motiverade dem att vara frivilliga och om de hade för avsikt att fortsätta vara frivilliga i framtiden. En explorativ faktor-analys genomfördes för att visa på de underliggande faktorer som var gemensamma i svaren. I denna faktoranalys upptäcktes totalt 12 underliggande faktorer baserat på de 48 frågorna i enkäten. Dessa faktorer analyserades därefter med en regressionsanalys för att undersöka vilka av dessa som är mest avgörande i frivilligas motivation att fortsätta vara frivilliga.
Resultatet visade att de faktorer som hade störst positiv inverkan på motivationen att fortsätta vara frivillig var Socialt sammanhang, Självbild, och Kompetens. De faktorer som hade störst negativ inverkan var Larmtrötthet och Negativa upplevelser. Resultaten från studien kan användas för att genomföra interventioner för att öka frivilligas motivation, genom att till exempel motverka larmtrötthet genom smartare utlarmningsalgoritmer eller utbildningsinsatser som ökar de frivilligas kompetens, och då förhoppningsvis även behålla fler frivilliga över tid
Drönare för snabbare lägesbild
No full textProjektet Hjärtstartare med drönare som inleddes 2020 startade med finansiering från Vinnova samt Innovationsfonden VGR. Detta projekt har rönt stor uppmärksamhet i bland annat media, såväl nationellt som internationellt
Projektet är unikt: det finns ingen kännedom om att ett liknande operationellt system finns uppsatt, vare sig i Sverige eller övriga världen. I nuläget finns i systemet fem hangarer i drift i regionen
Projektet har lett till insikter kring hur drönare kan, utöver leverans av hjärtstartare, också vara först på plats vid en akut händelse. Bildöverföring från skadeplats, där larmoperatören kan få ett visuellt stöd i bedömning och dimensionering. Tester kring denna tillämpning pågår 2022-23. Denna funktion bedöms beröra flera samverkande myndigheter och kanske snarare är att betrakta som en samhällsresurs än en sjukvårdsresurs.
Analyzing Passing Metrics in Ice Hockey using Puck and Player Tracking Data
Get PDFTraditional ice hockey statistics are inherently biased towards offensive events like goals, assists, and shots. However, successful teams in ice hockey require players with skills that may not be captured using traditional measures of performance. The adoption of puck and player tracking systems in the National Hockey League (NHL) has significantly increased the scope of possible metrics that can be obtained. In this paper, we compute recently proposed passing metrics from 1221 NHL games from the 2021-2022 season. We analyze the distributions of values obtained for each player for each metric to understand the variance between, and within, different positions. We find that forwards tend to complete fewer passes with smaller passing lanes, while defensemen pass to forwards significantly more than their defensive partners . Additionally, because these new metrics do not correlate well with traditional metrics (e.g., assists), we believe that they capture aspects of players’ abilities that may not appear on the game sheet
A Novel Multi-Pump System for Hydraulic Actuation in Electric Mobile Machinery
Get PDFAn observable trend nowadays is the change in the prime movers of mobile heavy machinery to electric alternatives to achieve more eco-friendly equipment. These solutions often require large and heavy batteries with limited capacity, making the research of more efficient components and the development of different system architectures an important topic of study. Hydraulic actuation is still a relevant application for these vehicles because of its reliability, controllability, and high power density. The electrification and digitalization of mobile machinery allow for innovative designs and control strategies to be implemented that take advantage of electro-hydraulic systems and their characteristics. Similar research has shown that a higher number of degrees of freedom allow for the system to operate with higher total efficiency. This paper introduces a novel actuation architecture that combines multiple fixed displacement hydraulic pumps and on/off directional valves to control the position and force of two hydraulic actuators for the working functions of a mobile machine. Each pump is powered by a variable speed electric drive so that each one can be operated independently, and together with the set of directional valves, allows the selection of different combinations of pumps and flow sharing between the actuators’ chambers to achieve the desired flow and pressure on each cylinder. The multi-pump system favours the use of smaller pumps, and the possibility of combining their flows reduces the need to operate the components at lower efficiency points such as partial displacement. At the same time, controlling the pumps’ flow through the variable-speed electric motors means that throttling valves are not needed. The development of this architecture will allow for its use in mathematical models to analyse its behaviour and efficiency and to obtain insights regarding points of improvement in the system architecture
Energy Efficiency Analysis and Experimental Test of a Closed-Circuit Pneumatic System
Get PDFIn a closed-circuit pneumatic system the air from the pneumatic cylinder is not exhausted directly in the atmosphere, as done in traditional open-circuit systems, but is captured and fed to the compressor inlet. This provides an opportunity to increase the compressor inlet pressure above the atmospheric and consequently enables both higher compression efficiency and volumetric flow rate. Until the present, the advantages of the closed-circuit pneumatics were assessed only within theoretical studies without being verified experimentally due to uncertainties in performance of a real compressor under oscillating pressure and flow rate, as well as due to a risk of mutual cylinder interference caused by differences in load and required pressure profiles. Hence, this study focuses on experimental investigation of energy efficiency and practicability issues of the closed-circuit pneumatics. It is shown that simultaneous operation of two pneumatic cylinders of different size (Ø32×200 and Ø50×200) performing different tasks (high-dynamic mass handling and extension against the constant force) does not have any negative effect neither on the cylinder dynamics nor on the compressor performance. Inlet pressure increase up to 1.5 barrel leads to by factor 2.5 higher volumetric flow rate and total efficiency gain of 72 % (increase from 10.7 % to 18.4 %). The experimentally obtained results show a great potential of the closed-loop pneumatics and indicate the need in further research into design and control methods of such systems to enable technology deployment to the industry. Industrial applications can profit from the reduced energy consumption especially in case of pneumatic systems with decentralized air supply