User Value Research Articles

Redesigning the Colega Application Interface and Interaction Using the Learner-Centered Design Method

In the rapid development of technology, almost all activities are carried out online, activities become timeless so that many students have difficulty in managing time between lectures and other activities. So that students must be able to organize their activity schedule, record tasks and activities that must be completed. One of the efforts that can be made is to use colega products which are technology products to remind activities. The purpose of this research is to redesign the Colega mobile application interface that is suitable and easy to use based on student needs to increase the level of usability with the learner-centered design method., this method is a design process that focuses on the needs of learner, by performing 5 stages, namely Specify the context of use, Specify user requirements, Product design solution, and Evaluate against user requirements. The product developed using this method, the principle of this method is a collaboration that allows learner to develop, test, and analyze their ideas for the product to be made. Interface design and interaction testing using the System Usability Scale. the results of usability testing on the interface obtained a value of 60.62 to 78.12. With the test results obtained an increase in value in the usability aspect. So it can be concluded that the usability value falls into the good and acceptable category.

A skinning technique for modeling artistic disk B-spline shapes

Disk B-spline curve provides an alternative shape modeling tool to standard control point based modeling techniques by extending control points to control disks, resulting in an easy and straightforward way of modeling regions or shapes with adjustable thickness. Due to this feature, disk B-spline curves are frequently applied in artistic shape modeling applications, such as brushstroke representation, calligraphy, and animation, but they are also suitable for engineering purposes. However, the boundary curves of the described shapes tend to have unintentional self-intersections or cusps, negatively affecting the usability and artistic value of the resulting shape and texture. In this paper, we introduce an iterative algorithm to give a solution to this problematic issue with the help of an approximating circle skinning method, while preserving the advantageous properties of the disk B-spline curves. Our method also results in smoother texturing of the shape around the more sharply curved sections.

Perancangan Sistem Informasi Pengelolaan Praktikum Berbasis Website

Practicum is one of the supporting activities in the learning process as well as routine and mandatory activities that students must follow. Practicum management at the Untirta Industrial Engineering Laboratory is still carried out conventionally, so it is inflexible, inefficient, and the information provided is not detailed and transparent. The design of information systems in practicum management is carried out to overcome these problems. This study aims to obtain a practicum management information system design at the Untirta Industrial Engineering Laboratory. The method used in this study is the Framework for the Applications of System Thinking (FAST) method. The results of this study indicate that the practicum management information system design at the Untirta Industrial Engineering Laboratory is in the form of a context diagram that describes the process and scope of the system. Data flow diagrams provide an overview of data flow in processes within the system and entity relationship diagrams describe the relationships that exist in entities. Blackbox testing has been carried out on 17 page groups and shows valid results and functions properly. The usability test resulted in a system usability scale value of 86.75 which indicates that the designed information system is acceptable with grade B and an excellent rating.

ANALISIS KELAYAKAN APP-INVENTOR SEBAGAI BAHAN AJAR MATAKULIAH MOBILE PROGRAMMING MENGGUNAKAN METODE SYSTEM USABILITY SCALE

Media in the learning process is a tool or intermediary in the delivery of learning material that can provide more knowledge and experience to students. The advantage of App Inventor lies in the ease of programming, where users do not need to have basic programming knowledge, understand code, or have experience in IT, but the most important thing in making applications using App Inventor is how programmers use logic like when someone puts together a puzzle. . In this research, a feasibility study and analysis was carried out using the System Usability Scale (SUS) method so that it could improve the quality of learning and the novelty of teaching materials in the Makassar Professional STMIK environment. The sampling technique used in this research is random sampling or probability sampling. Based on the results of the recapitulation of the respondents' assessment, the average usability of the system was 72.83, then the grade of the assessment was determined. It was concluded that the results of the Recap of Usability Values showed that all attributes had a usability acceptance value by the user, the average value was above 68.00, namely 72.83. For Android users to be able to use APP-Inventor properly so that it is useful to support special learning activities in the Mobile Programming course.

Ethnobotany of food plants used by Minangkabau Community in Lima Puluh Kota District, West Sumatra, Indonesia

Abstract. Agesti ARA, Ariyanti NS, Chikmawati T, Purwanto Y. 2023. Ethnobotany of food plants used by Minangkabau Community in Lima Puluh Kota District, West Sumatra, Indonesia. Biodiversitas 24: 2756-2767. The Minangkabau tribe is well known for its culture and cuisine, but documents on their knowledge and wisdom in the utilization of food plants are still limited. This study aims to inventory plant species used for food by Minangkabau community, assess their importance and economic value, and analyze the important landscapes where the food plants are obtained. This study was conducted in six villages representing different level of modernization in Lima Puluh Kota District, West Sumatra which is one of the centers of origin of Minangkabau ancestral. Data were collected through open, semi-structured and structured interviews with key informants and respondents. The Pebble Distribution Method (PDM) is used for scoring activities. Data were analyzed to show the use values (UVs), local user's value index (LUVI), index of cultural significance (ICS), and economic value of the food plants. The interviewed informants mentioned 154 plant species from 51 families were used for food. Cocos nucifera L. has the most various uses as food (highest UVs) and is the most important cultivated plant for the Minangkabau culture (ICS) in all the six villages. The most important food plant species based on a community perspective (highest LUVI) is Oryza sativa L. The wild plants having the highest LUVI and ICS differed among the villages. Plants with high economic value include O. sativa, Durio zibethinus Murray and Citrus aurantium L. The landscapes considered important are paddy fields and fields because they provide staple food. Information from this study can support food diversification to achieve food security based on the local knowledge on the diversity of food plant species and potential landraces in Minangkabau community.

Usability Effectiveness of the State Polytechnic of Malang’s Learning Management System as e-Learning Media

The rapid development of information technology has impacted the education sector by supporting a more efficient and effective learning process. During the Covid-19 pandemic, online learning through e-Learning flourished and encouraged the transformation of conventional education to digital form, one of which is the Learning Management System (LMS). This research is aimed to carry out a deep analysis of its utilization as a learning media and the influencing factors of its utilization to determine the level of its usage effectiveness at the State Polytechnic of Malang. This research uses a quantitative descriptive method with a questionnaire as the research instrument for collecting data. The research uses System Usability Scale (SUS) evaluation method for determining scenarios, selecting respondents, collecting data, and performing calculations. The overall measurement results show that the SUS assessment score is 54.67, with a Learnability, Efficiency, and Memorability aspect score of 33.61. Then the Errors aspect score is 21.06, while the Satisfaction aspect score is 12.77. The LMS at the State Polytechnic of Malang has a low usability value, with a description Acceptability of Marginal, Grade Scale of D, and Adjective Rating of OK. Based on the final SUS score, the level of usage effectiveness of State Polytechnic of Malang’s LMS is still relatively low. However, its utilization is still accepted but needs improvement in some aspects.

Assessing decision-making skills: preliminary proof-of-concept data for DAssDec - Mod1STY and Mod2STR

From a psychological and neuroscientific perspectives, decision-making can be defined as a skill, a function and/or a process we pervasively implement in our everyday life. Embracing a definition of decision-making that describes it as a multicomponential, pervasive, and instrumental ability, the Digitalized Assessment Tool for Decision-Making (DAssDec) – a novel digitalized assessment tool – has been devised with the specific purpose to capture the multifaceted nature of decision-making and to sketch an articulated profile of its many dispositional and situational manifestations. We here introduce preliminary outcomes from proof-of concept and feasibility study performed on the first two domains of the DAssDec Tool – Mod1STY and Mod2STR – dedicated to decisional styles and strategies. 35 professionals working in managerial departments of a large service company took part in the study. Findings pointed out the feasibility, usability, and practical value of the investigated sections of the DAssDec tool. Also, first quali-quantitative analyses of participants responses and performance at the tasks included in the tested domains have already highlighted the potential of the tool to detect interindividual differences, thus pairing the opportunity to outline a global profile of a work team with specific individual profiles of decision-making skills and their subjective determinants.

An aeronautical data communication demand model for the North Atlantic oceanic airspace

Information exchange via aeronautical data communication is of increasing importance for the communication between pilots and air traffic control, providing the basis for surveillance of aircraft in oceanic or remote airspaces, as well as enabling the communication between an airlines’ fleet and its operational control. The aeronautical data communication that is being transmitted via data link encompasses, among others, surveillance-related aircraft position updates, clearances for flight path change requests, maintenance-related status reports, estimated arrival times and weather information in accordance with the required performance, that is set by technical standards. Aeronautical data communication events are driven by an aircraft’s flight phase, the current airspace or may occur in a randomized manner throughout the flight. As the usage of aeronautical data communication is expected to grow in future, ample data link technologies are being evaluated and developed. The usability and operational value of new data link technologies for aeronautical applications can be evaluated by applying suitable models of the respective data link communication pattern combined with operational simulations. Current models for aeronautical data communication demand support the design and evaluation of direct aircraft-to-ground communication networks. The geographical location of the data communication demand is secondary for these models, since coverage areas can be defined, where direct communication links are available. New data link technologies offer the opportunity of direct data transfer between aircraft and forwarding of messages from sending aircraft to a ground entity via ad-hoc communication networks between aircraft. This is of special interest for the North Atlantic oceanic airspace, an airspace with high traffic density and little ground infrastructure, where communication currently relies mostly on satellite-based systems. For these airborne ad-hoc networks the definition of coverage areas around ground or space-based entities is not possible. To assess the new data link technology a model for aeronautical data link communication demand is needed, that accounts for operationally derived communication events such as handover procedures at boundaries of oceanic control areas or status reports at route-specific waypoints, which cause an accumulation in certain geographical regions that pose a challenge to the dynamic connectivity coverage of aeronautical ad-hoc networks. Addressing this issue, we present a new modelling approach for air traffic service communication that considers the operational context of the simulated airspace and provides a geospatial data communication demand distribution, which is derived from air traffic management procedures, airspace geometries and events inherent to each flight path. The air traffic service communication is then validated based on 2019 air traffic and performance monitoring data provided by ICAO supplemented by an existing model for communication related to airline operational control. In a next step, the communication demand per area in the North Atlantic Oceanic airspace is being assessed. The aeronautical data traffic model shows deviations of less than one message per aircraft and airspace when compared to recorded data traffic from 2019 for two key services in the most frequented North Atlantic oceanic control areas. Therefore, it is assumed to be suitable for the evaluation of network-based data link technology and operational impact assessments.

Users’ perception for innovation and sustainability management: evidence from public transport

No one doubts the importance of public transport services in the economic backbone of any country. In recent decades, there has been a growing interest in the contribution to Sustainable Development Goals on the part of governments, companies, and stakeholders. In this sense, transport can contribute to the sustainability of cities and facilitate other social objectives, such as universal accessibility, with innovation being a key pillar for this. Thus, the main objective of this study is to analyze users’ perceptions of the innovation and sustainability of public transport in Spain.To analyze the user’s perception of public transport, a questionnaire was developed following Bitner’s Servicescape Model. A total of 1,354 responses were collected in different Spanish cities. The main results show that the policies implemented in both innovation and sustainability are perceived positively but do not seem to have much impact on the service user. Public transport users prioritize the speed, frequency, and safety of the service received. In addition, it should be noted that the gender of the user influences the preferences of the objectives, i.e., men value technological development in public transport more. At the same time, women give higher priority to sustainability. The age of users is another variable that conditions public transport users’ perceptions of innovation and sustainability. The results also show users’ preferences for different types of public transport.The study’s main contribution is that it shows to what extent the innovation and sustainability policies applied in the public transport service are valued and motivate citizens to use the service. The political and management decisions may be disconnected from the reality perceived by users. These decisions may be more linked to regulatory pressures and involve a high implementation cost, so it is necessary to consider the valuation of users’ service so that the benefit or social return of these investments is high, encouraging the use of the service.

Guest editorial: Application of cloud energy storage systems in power systems

Guest editorial: Application of cloud energy storage systems in power systems

Perancangan aplikasi android tanaman hias dengan metode UX Interface untuk memacu daya agribisnis ibu rumah tangga (Studi kasus di kecamatan Palaran, Kalimantan Timur)

Ornamental plants are plants that have aesthetic value in terms of color, shape, and characteristics. Planting and maintaining ornamental plants has now become a hobby that housewives are interested in, especially in the Palaran sub-district, East Kalimantan. Housewives take advantage of their free time to do quality and business value things and generate side income, one of which is farming. The ornamental plant business is an agribusiness business. Agribusiness is a business activity of cultivating agricultural products both on a narrow and wide scale. However, it is difficult to find a contractor, demotivating housewives in the ornamental plant business. This raises the need for technology that can provide information, bring together sellers and contractors in a practical way, with minimal costs, able to communicate and transact at any time. From these problems, an Android-based Mobile E-Commerce application was designed using the UX Interface by JJ method. Garrett. The application that has been designed is then tested for usability using a measuring tool for effectiveness, efficiency, and user satisfaction. The usability value obtained is 88.69%. This proves that the application designed has helped users in caring for ornamental plants and has created a desire to do ornamental plant business because they get relevant price recommendations and information on what plants are currently hot so that the collection of ornamental plants which can be of commercial value.

IMPLEMENTASI PENGUJIAN LEARNING MANAGEMENT SYSTEM APLIKASI PEMBELAJARAN JARAK JAUH BERBASIS MOODLE DI UNIVERSITAS XYZ

Increasing learning by innovating internet-based information technology and e-learning, providing convenience in increasing learning flexibly without space and time limits, implementing distance learning that is officially licensed by the government, providing fresh air for universities or institutions in developing Innovative applications using the Moodle LMS are more interactive and customized. Writing this article uses an experimental method by designing a moodle LMS with domain hosting in Informatics study program, implementing Moodle LMS to find out how far the comparison is between blended learning which is currently used at XYZ University, based on test results by distributing questionnaires to informatics students, the average usability value is obtained -average 92.1%.

Research on potential user identification and optimal planning of the multiple time scale cloud‐based location sharing energy storage

AbstractCloud energy storage is considered a promising application in future power systems. It focuses on optimally leveraging the capacity of centralized large‐scale energy storage compared with the requirements of small‐scale localized users. In this paper, to satisfy the small‐ and medium‐scale timely energy storage requirement from localized users, the concept of the cloud‐based location sharing energy storage is proposed. The modular mobile energy storage system is flexibly configured and deployed at different sites to fulfil the long‐term seasonally dynamic transformer capacity increment and short‐term daily energy arbitrage based on economic values. To optimize the overall incomes of the energy storage investment, a two‐step user potential identification algorithm is proposed to discover the most valuable users at different time scales from the regional power usage profile. Then, the number/capacity optimal planning algorithm is proposed to optimally share the mobile energy storage system among users seasonally and total profits are further increased through daily energy arbitrage at less valuable seasons. Finally, the structure and dispatching strategy of the cloud‐based location sharing energy storage management system is illustrated. Case study results prove that the proposed identification algorithm can excavate the most valuable users at different time scales and the optimal planning and operation strategy is able to guarantee the overall income benefits.

An Efficient Decentralized Identity Management System Based on Range Proof for Social Networks

Online social networks (OSNs) are becoming more and more popular in people's lives as the demand for online interaction continues to grow. Current OSNs are using centralized identity management system (IDM), which has some problems of single point of failure and privacy data leakage. The emergence of decentralized identity (DID) can solve these problems. However, most existing DID systems have some privacy issues that a user's attributes value are disclosed while accessing service. In this paper, we design a DID protocol to solve these challenges. The proposed protocol includes a range proof protocol to provide attribute privacy. The range proof protocol works with anonymous credentials and does not need a trusted setup. Moreover, the identity model behind the DID protocol is extended from an existing model, which achieves identity revocation. Finally, we implement a system prototype on the blockchain for evaluation. The security analysis shows that our protocol provides stronger privacy protection. The performance evaluation indicates that the computation cost and blockchain overheads of our protocol are acceptable in OSNs.

Improving Organoleptic and Physicochemical Properties of Breadfruit Flour through Tannin Reduction

Breadfruit is classified as a climacteric fruit with a fast respiration process, and in fresh form it has a short shelf life. Breadfruit is a fruit with high carbohydrate content; therefore, it is suitable for processing into flour as well as increasing shelf life, usability, and economic value. The problem is, there are compounds that cause a bitter taste in breadfruit flour. This study aims to develop processing technology to reduce bitter compounds and characterize breadfruit flour. Processing of breadfruit flour selected from the ten methods developed, consisting of peeling the breadfruit, washing, and cutting, blanching (10 minutes) followed by slicing, soaking (in 0.03% sodium bisulfite, 1 hour), pressing, drying the breadfruit chips, and milling. The best method is applied to produce breadfruit flour from various regions (Bone, Seribu Islands, Yogyakarta, Cilacap and South Tangerang). The results showed that the best process could reduce tannins and cyanide up to 84% and 93%, respectively. The characteristics of breadfruit flour from various regions are different. The flour yield ranges from 17-24% of the fruit weight. Breadfruit flour has a carbohydrate content of 92-94% (db), dietary fiber 6.8-8.1%, amylose 17.7-26.1%, tannins 0.11-0.24%, HCN 0.41-1.89 ppm and digestibility of starch in vitro 72.3-87.2%.

Evaluasi Usability pada Aplikasi OVO Menggunakan Metode System Usability Scale (SUS)

In the current era of globalization, information technology is developing very rapidly. On the other hand, during this pandemic due to the impact of COVID-19, Fintech is also widely used, especially the OVO application and plays an important role in reducing the amount of spread of the COVID-19 virus because we don't have direct physical contact. Based on Neurosensum's research, he presented the results of digital research with a special study focusing on the use of e-wallets as a digital transaction medium for 1,000 active e-commerce user respondents of productive age (19-45 years) simultaneously in 8 major cities in Indonesia during November 2020 - January 2021. The results of the research stated that OVO occupies the 2nd place with the highest market penetration and the most promotions, OVO has the lowest rating on the Google Playstore of 4.0. when compared to other fintech applications. Based on data from the Google Playstore, the OVO application has experienced a decrease in rating due to frequent errors, so many users have submitted complaints to reviews on Google Playstore, such as OVO user complaints regarding transaction limits, feature limitations, slow performance of the OVO application. Complaints submitted by OVO users tend to point to the quality of service and systems in the OVO application. Even though the higher the quality of the services provided will significantly affect the level of user satisfaction. In this study, an evaluation was carried out using the SUS method, namely to measure the feasibility level of the application on the user's side so that the application can be useful and can properly address user needs. And based on testing the data that has been processed, the average usability value of the OVO application gets a score of 69.23. This score shows that the OVO application has a usability level already in the OK category where the average usability value of the OVO application is more than equal to 68, which means that it is still generally acceptable but with several improvements such as increasing the use of better features so that it runs smoothly. properly and improve the appearance of the user interface which is easier to understand and use for new users so that it increases good usability in using the OVO application

Sistem Informasi Ekstrakurikuler Berbasis Web Pada SMK Muhammadiyah Somagede

Extracurricular is an activity aimed at developing potential, talents and abilities outside the academic field that must be followed by students.The extracurricular registration process at SMK Muhammadiyah Somagede is currently still using conventional methods in the form of paper forms.In addition to this, the process of recapitulating student data from each extracurricular activity, which is still done manually. This process takes a long time because you have to check each formula sheet and also have a lot of risk of errors. It should be more efficient if it is done online using an information system that can simplify, save time and cost in the extracurricular selection process and the student data recapitulation process. The purpose of this system is the creation of an Extracurricular Information System that can speed up and make it easier for grade 10 and 11 students to make selections and make it easier to manage registrant data for each extracurricular.The benefit of this system is that it helps the Student Staff of SMK Muhammadiyah Somagede to process extracurricular information data and process student data and recap data on extracurricular registrants, for Class 10 and 11 students of SMK Muhammadiyah Somagede it is easier to get extracurricular information and the extracurricular selection process, for those in charge of extracurricular activities at SMK Muhammadiyah Somagede Makes it easier to get information on the schedule of extracurricular activities that are taught and student registration data, for the Principal of SMK Muhammadiyah Somagede and PCM Somagede Staff Makes it easier to get information from extracurricular activities and find out the comparison graph of the extracurricular activities that are most chosen by students, and as a medium to introduce STIKOM Yos Sudarso Purwokerto to the general public. In this case the system development method uses a prototype model. Based on the results of the benefit test, the average value of the Correctness value is 99.37%, the Usability value is 97.5%, the Efficiency value is 97.5% and the Reliability value is 99.12%. From the results of the benefit test, it can be concluded that the Web-Based Extracurricular Information System at SMK Muhammadiyah Somagede can be used to speed up the recapitulation process of extracurricular registrants

HistoGuide mobile application (virtual microscopy and slides): A quantitative usability pilot study

HistoGuide application is a smartphone application system used by sixth-form students for virtual microscopy and slides to solve the problems of incorrect drawing and labelling, inability to apply magnification and scale, and inability to observe details in microscopic practical works. However, as a newly developed application, many still do not understand the usability of the HistoGuide application. In building a good application, one important part is good usability. Usability testing, especially in the HistoGuide application, can show users' ease and efficiency in using the system. The authors try using the USE questionnaire with 33 respondents as a pilot study before a real one. The analysis resulted in an average value of the usefulness construct of 92.8%. Then, the construct ease of use with 92.4%, ease of learning with 92.4%, and satisfaction with 93.8%. These results indicate that the HistoGuide application is good. The results of measuring the usability of the HistoGuide application with the classification "High" to use, with a usability value of 92.8%. The results of usability measurement are expected to help develop and improve the HistoGuide application in the future to complement the conventional microscopic practicals works.

EVALUATION AND REDESIGN USER INTERFACE METOOCEL APPLICATION USING HUMAN CENTERED DESIGN METHOD

Metoocel application is the name of the application from a shop that sells smartphone and laptop accessories in the Surabaya area. Metoocel application was created to make it easier for users to view product catalogs and make product purchases online through the application without the need to come to the location. However, Metoocel application has never been evaluated regarding usability since the application was created. Therefore, it is necessary to evaluate to determine the usability value of the Metoocel application. Through the initial evaluation of the study using the System Usability Scale questionnaire, the Metoocel application obtained a score of 54 so that it was included in the "F" grade scale category and the "Low Marginal" acceptability ranges category. This shows that Metoocel application still has shortcomings related to application usability. To overcome these problems, a redesign of the user interface was carried out using the Human Centered Design method which focused on user needs in Metoocel application. The result of the redesign is a prototype of Metoocel application. Then, the prototype that has been designed is evaluated using SUS to compare the usability value of the application before and after redesigning the user interface. The test results show that the prototype gets a score of 80 including the grade scale category "B" and the Acceptability Ranges category "Acceptable" which means the function of the application prototype has worked well and can increase the usability value of the application.

System Usability Scale (SUS) Pada Bank Sampah Digital Sebagai Solusi Penanganan Sampah

As time goes by and the number of human needs causes organic and inorganic waste to accumulate, the Environment and Hygiene Service provides garbage disposal sites at several points, but still the garbage is scattered on the roadside, and the smell disturbs road users who pass. Garbage accumulation is more focused on inorganic waste which is managed by the waste bank unit. The Department of Environment and Hygiene has several units of garbage bins scattered in several sub-districts in the city of Dumai, one of which is the Bukit Kapur Garbage Bank Unit, currently the management of the waste bank is still using written media to record transaction data on waste sales, reporting is sometimes too late, The accumulation of sales funds often results in miscalculations. For this reason, create a digital application that can help the Waste Bank unit in managing inorganic waste. With this digital waste bank application, it can make it easier for officers to manage waste management and can provide information related to waste banks to the surrounding community. Testing this application using the System Usability Scale (SUS) to evaluate the usability of the application that has been designed. The usability value of this Digital Waste Bank application is 77.8 which means it is in the acceptable category.