1,577 research outputs found
The SX software development framework: a case study
No full textLAUREA MAGISTRALEABSTRACT IN ITALIAN
La user experience (UX) del software ha acquisito un'importanza significativa negli ultimi anni, poiché gli utenti si aspettano sempre più soluzioni digitali non solo funzionali ma anche intuitive e piacevoli da usare. In risposta, le metodologie UX sono state integrate nei processi di sviluppo del software, portando a una migliore usabilità e alla soddisfazione complessiva dell'utente. Questa tesi di master presenta un caso di studio che esplora l'applicazione della metodologia UX per migliorare il framework di sviluppo software SX, sviluppato in collaborazione con FLUXO Business Automation durante il tirocinio obbligatorio presso POLIMI. L'approccio di ricerca ha utilizzato il pensiero progettuale e la struttura a doppio diamante per creare una metodologia unica su misura per il caso di studio. Coinvolgendo gli utenti nel processo di progettazione e iterando in base al loro feedback, è stato possibile identificare e affrontare i problemi di usabilità nel framework software SX. I risultati del nostro studio hanno dimostrato che l'integrazione della metodologia UX nei sistemi sviluppati all'interno del framework SX può portare a miglioramenti significativi nell'esperienza utente e nella qualità complessiva del prodotto. L'integrazione della metodologia UX in SX si è rivelata estremamente vantaggiosa ed è stata apprezzata da FLUXO. Si raccomanda che la ricerca futura esplori come altri metodi di ricerca degli utenti possono essere integrati nei processi di FLUXO per migliorare ulteriormente l'efficacia dei loro processi di sviluppo software all'interno di SX.ABSTRACT
The user experience (UX) of software has gained significant importance in recent years, as users increasingly expect digital solutions that are not only functional but also intuitive and enjoyable to use. In response, UX methodologies have been integrated into software development processes, leading to improved usability and overall user satisfaction. This master's thesis presents a case study that explores the application of UX methodology to enhance the SX software development framework, which was developed in collaboration with FLUXO Business Automation during compulsory internship at POLIMI. The research approach employed design thinking and the double diamond framework to create a unique tailored methodology for the case study. By involving users in the design process and iterating based on their feedback, it was possible to identify and address usability issues in the SX software framework. The results of our study demonstrated that incorporating UX methodology into systems developed within SX framework can lead to significant improvements in user experience and overall product quality. The integration of UX methodology into the SX proved to be highly beneficial and was appreciated by FLUXO. It is recommended that future research explore how other user research methods can be integrated into FLUXO's processes to further enhance the effectiveness of their software development processes within SX
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The performance of the NEC SX-2 and Cray X-MP supercomputers
No full textSince our first article on the Japanese supercomputers appeared in the December 1985 issue of Computer, we have conducted additional benchmarks of the new NEC SX-2 vector processor. We present these new results for the SX-2 and updated timings of the X-MP/48. 5 refs., 1 fig., 6 tabs
Experimental data-tracking of the BMX SX gate start using biomechanical modeling and trajectory optimization
No full textIntroduction During Bicycle Motocross races (BMX SX), the start has been proven to be crucial for good overall performance [1]. Riders reaching the bottom of the eight meter high starting ramp in front of the pack, have a favorable position to perform the first jump and can pick the most ideal line through the first corner. The chances of getting involved in collisions with other riders are also highly reduced. Since riders start behind a gate, the anticipation and timing with respect to this gate movement are most important [2]. Most scientific research regarding the BMX SX gate start is focused on defining the performance indicators for a fast start [2] [3] [4] or using in-field experimentsto evaluate the effects of minor changes to the bicycle design [5] [6]. However, using the results of these studies to actually improve the start performance would require extensive training using these new conditions. Using predictive simulations, these adaptations can be evaluated without practicing and can thus have a huge contribution to enhancing the gate start technique. However, before these simulation models can have any impact, they must be thoroughly analyzed to prove their validity.Objective The main goal for this study was to construct a biomechanical model for the BMX SX gate start which could reproduce experimental data. The model must be able to track kinematic data with an accuracy of less than 5% while also match the main kinetic characteristics without tracking those. The kinetic profiles should show the same peak pattern as is commonly seen in cycling and must not differ more than 10% with experimental data. When these goals are reached, this model could serve as a framework for future applications within BMX SX gate start research or other cycling disciplines.Method A nine degree-of-freedom biomechanical planar model was created within the open-source software package OpenSim [7] [8]. The model consists out of the ground surface, the gate, the BMX SX bicycle, and the rider. The latter two are connected using kinematic constraints on the feet and pedals. The upper body is connected to the frame by a single arm. The model is driven by eight optimal torque actuators located at the hip, knee, ankle, shoulder, and elbow joints. The contact dynamics of the wheels to the ground and the gate are included using the Hunt-Crossley model [9]. Moco [10], a direct collocation package for OpenSim, was used to solve the kinematic tracking optimization problem. The kinematic data was taken from a prior study by Melle van Dilgt [11] who captured three-dimensional kinematics of an elite female BMX SX athlete of the Dutch National team using an Xsens suit (Xsens Technologies, Enschede, The Netherlands). This IMU data was projected on the planar model using OpenSense, a tool within OpenSim that converts experimental IMU data into the model’s generalized coordinates. Simulation outcomes were compared to kinetic data collected by Hylke van Grieken [4], who used a fully instrumented bicycle including special cranks (Axis2D, Swift Performance, Brisbane, Australia) to capture the pedal forces executed during in-field experiments with a sample rate of 100 Hz. These experiments used the same elite participant but were taken on a different day using a different bicycle.Results The optimized tracking simulation showed close agreement with experimental kinematic data, showing an average root mean squared error (RMSE) of 0.337° or 0.52% for the six leg joints. For the tracking of the crank angle and the horizontal displacement of the bicycle similar results were found (RMSEs of 0.079% and 0.6% respectively). Simulated crank torque peak values were off by 4.4%, 7.7%, and 5.1% for the first, second and third torque peak respectively. Overall the crank torque was reproduced with an RMSE of 18%.Conclusion This work shows the suitability of the designed model for future applications in predictive simulation of the BMX SX gate start. The model can be used to study a wide range of "what-if" scenarios and could lead to the improvement of gate start performance. The way the model is constructed, the main building blocks can be adjusted to more accurate, but also more complex, components if desired.<br/
Variation of moments of inertia with angular momentum and systematics of bandhead moments of inertia of superdeformed bands
No full textThe variation of the kinematic and dynamic moments of inertia and the bandhead moments of inertia J(0) systematics of superdeformed (SD) bands in the A similar to 190 region are investigated, which turns out to be helpful in the spin prediction of SD bands. The spins of about 70 SD bands in the A similar to 190 region are predicted by these approaches in combination with the usually adopted best-tit method. The J(0) systematics seems to be Very useful to the understanding of the properties of excited SD bands and the implication of identical SD bands. [S0556-2813(98)02711-3].Physics, NuclearSCI(E)26ARTICLE63266-32795
RANCANG BANGUN ALAT DETEKSI CO PADA EMISI HASIL PEMBAKARAAN KENDARAAN BERMOTOR BERBASIS KOMUNIKASI LoRa Sx 1278
No full textTeknologi komunikasi nirkabel atau yang biasa disebut wireless merupakan sebuah teknologi yang memungkinkan sebuah komunikasi tanpa menggunakan kabel. Teknologi nirkabel yang digunakan saat ini seperti wi-fi, Bluetooth, dll. Penggunaan teknologi nirkabel ini dapat mempermudah pekerjaan manusia apabila dimanfaatkan secara maksimal. Akan tetapi, masyarakat masih banyak yang belum paham bagaimana cara memanfatkan teknologi ini untuk mempermudah pekejaan mereka. Oleh karena itu penulis berusaha merancang sebuah alat yang dapat berguna bagi teknisi di bengkel untuk mengetahui kadar CO dari emisi gas buang kendaraan bermotor. Alat yang dirancang ini berfungsi untuk mengetahui kadar CO dari emisi gas buang kendaraan bermotor dengan komunikasi LoRa Sx-1278 sebagai modul komunikasi wireless. Bagian-bagian dari alat ini terdiri dari microcontroller, Sensor CO (Mq-7), modul LoRa Sx-1278, dan LCD 2x16. Sensor CO membaca nilai CO dari emisi gas buang kendaraan bermotor yang kemudian diproses oleh microcontroller. Selanjutnya, data pembacaan sensor yang telah diproses oleh microcontroller dikirim melalui LoRa transmitter ke LoRa receiver untuk ditampilkan di LCD 2x16 agar dapat dilihat hasil pembacaannya. Dari hasil pengujian, alat dapat bekerja dengan baik. Setelah dibandingkan dengan alat acuan yang dipakai yaitu stargas 898, nilai error rata-rata yang didapatkan adalah 4.32%. Alat yang dirancang sudah dapat membaca nilai kadar CO dari 0-2118 ppm. Untuk proses pengiriman data menggunakan LoRa Sx-1278, data dapat diterima seluruhnya tanpa kehilangan satupun data dari rentang jarak 0-300 meter. Kata kunci : wireless, microcontroller, Sensor CO, Emisi gas buang kendaraan bermotor, LoRa Sx-1278, pengiriman data, kadar CO ABSTRACT Wireless communication technology or commonly called wireless is a technology that allows communication without using a cable. The wireless technology used today is Wi-Fi, Bluetooth, etc. The use of wireless technology can facilitate human work if utilized optimally. However, many people still do not understand how to use this technology to facilitate their work. Therefore the author tries to design a tool that can be useful for technicians in the workshop to determine CO levels of motor vehicle exhaust emissions. This tool is designed to determine CO levels of motor vehicle exhaust emissions with LoRa Sx-1278 communication as a wireless communication module. Parts of the tool consist of microcontroller, sensor CO (Mq-7), LoRa module Sx-1278, and 2x16 LCD. CO sensors read CO values ​​from motor vehicle exhaust emissions which are then processed by a microcontroller. Furthermore, the sensor readings data that have been processed by microcontroller are sent through LoRa transmitter to LoRa receiver to be displayed on LCD 2x16 in order to be able to see the reading result. From the test results, the tool can work well. After comparison with the reference tool used is stargas 898, the average error value obtained is 4.32%. The designed device can read CO level values ​​from 0-2118 ppm. For the process of sending data using LoRa Sx-1278, the data can be received entirely without losing any data from a range of 0-300 meters. Keyword : wireless, microcontroller, CO Sensor, motor vehicle exhaust emissions, LoRa Sx-1278, data transmission, CO levels
Characterization of macromolecular organic matter in atmospheric dust from Guangzhou, China
No full textOccurrence, bioaccumulation and risk assessment of dioxin-like PCBs along the Chenab river, Pakistan
No full textEffective Hydrogen Production from Alkaline and Natural Seawater using WO3-x@CdS1-x Nanocomposites-based Electrocatalyst
No full textOffshore hydrogen production through water electrolysis presents significant technical and economic challenges. Achieving efficient hydrogen evolution reaction (HER) in alkaline and natural seawater environments remains daunting due to the sluggish kinetics of water dissociation. We synthesized electrocatalytic WO3-x@CdS1-x nanocomposites (WCSNCs) using ultrasonic-assisted laser irradiation to address this issue. The synthesized WCSNCs with varying CdS content were thoroughly characterized to investigate their structural, morphological, and electrochemical properties. Among the samples tested, the WCSNCs with 20 wt.% CdS1-x in WO3-x (Wx@Sx-20%) exhibited superior electrocatalytic performance for hydrogen evolution in a 1 M KOH solution. Specifically, the Wx@Sx-20% catalyst demonstrated an overpotential of 0.191 V at a current density of -10 mA/cm2 and a Tafel slope of 61.9 mV/dec. The Wx@Sx-20% catalysts exhibited excellent stability and durability even after 24 hours and 1000 CV cycles. Notably, when subjected to natural seawater electrolysis, the Wx@Sx-20% catalysts outperformed in electrocatalytic HER activity and stability. The remarkable performance enhancement of the prepared electrocatalyst can be attributed to the combined effect of sulphur vacancies in CdS1-x and oxygen vacancies in WO3-x. These vacancies promote the electrochemically active surface area, enhance the rate of charge separation and transfer, increase the number of electrocatalytic active sites, and accelerate the HER process in alkaline and natural seawater environments
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