Towards an Anatomy of Software Craftsmanship

Context: The concept of software craftsmanship has early roots in computing, and in 2009, the Manifesto for Software Craftsmanship was formulated as a reaction to how the Agile methods were practiced and taught. But software craftsmanship has seldom been studied from a software engineering perspective. Objective: The objective of this article is to systematize an anatomy of software craftsmanship through literature studies and a longitudinal case study. Method: We performed a snowballing literature review based on an initial set of nine papers, resulting in 18 papers and 11 books. We also performed a case study following seven years of software development of a product for the financial market, eliciting qualitative, and quantitative results. We used thematic coding to synthesize the results into categories. Results: The resulting anatomy is centered around four themes, containing 17 principles and 47 hierarchical practices connected to the principles. We present the identified practices based on the experiences gathered from the case study, triangulating with the literature results. Conclusion: We provide our systematically derived anatomy of software craftsmanship with the goal of inspiring more research into the principles and practices of software craftsmanship and how these relate to other principles within software engineering in general.

Suddenly Telework: Job Crafting as a Way to Promote Employee Well-Being?

COVID-19 confronted many people with an abrupt shift from their usual working environment to telework. This study explores which job characteristics are perceived as most crucial in this exceptional situation and how they differ from people’s previous working conditions. Additionally, we focus on job crafting as a response to this situation and how it is related to employees’ well-being. We conducted an online survey with N = 599 participants, of which 321 reported that they were telework newcomers. First, we asked participants to indicate the three most important advantages and disadvantages they see in telework. The subsequent questionnaire contained a comprehensive measure of working conditions before and during the pandemic, job crafting behaviors, and indicators of well-being. Based on the qualitative answers, we identified three major advantages and disadvantages. Quantitative results indicate perceived changes in all job characteristics for telework newcomers. Concerning working conditions and well-being, job crafting activities that aim to increase structural and social resources are important mediators. The findings underline the need to design appropriate telework conditions and encourage job crafting activities to foster occupational well-being.

Eucalyptus Leaves as Potential Indicators of Gold Mine in Indonesia

Eucalyptus is a plant that is able to absorb gold (Au) particles from the soil and store them in the leaves. Eucalyptus roots have the ability to penetrate the soil of the calcrete zone, which is rich in the mineral calcium (Ca). Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. and contains Au particles as impurities, making this plant a potential natural indicator (biogeochemical) of potential Au metal mining. The Au content in eucalyptus leaves can be determined by using the XRF (X-Ray Fluorescence) instrumentation material analysis method for qualitative analysis and AAS (Atomic Absorption Spectroscopy) for quantitative results. The form of XRF characterization of the intensity versus energy spectrum of certain elements from the XRF analysis results obtained is a spectrum with a peak power of 9.731 keV which indicates the presence of Au metal in the sample. The results obtained qualitatively are the Au metal content in the eucalyptus leaf sample of (9.0 ± 0.5) ppm. However, the Au metal content in each leaf sample was different. This provides information that Eucalyptus from different plants has the potential to be a biogeochemical indicator of potential Au metal mining in Indonesia

The Role of Responsive Leadership in Meeting Customers' Needs during Crises

This case study conducted to investigate the impact of a responsive leadership approach in meeting customers' needs in a higher education institution in the UAE during the COVID-19 pandemic. For this purpose, a mixed-method model has been used. The data has been collected from a convenient sample working and studying at Al Qasimia University Language Center, in fall 2020. This result indicates that the provided responsive leadership support during COVID-19 was effective and helped in motivating learners and customers to keep learning and making progress greater than what was shown before COVID-19, during the face-to-face teaching and physical assessment. Although the qualitative and quantitative results in this case study revealed a significant impact of responsive leadership approach on customers’ progress, there is still a need to conduct other researches to develop and validate a responsive leadership inventory to facilitate measuring of responsive leadership attributes in a large scale sample and/or population.

Computational tool for learning electrostatic physics through the development of a disruptive methodology

A computational tool for learning electrostatic physics is presented through the development of a disruptive methodology. The tool allows the analysis of case studies based on Coulomb’s law, Gauss’s law, Poisson’s equation, and Laplace’s equation with boundary value. The tool was tested using reference exercises for each case study, making use of quantitative and qualitative comparative analysis between the traditional mathematical development and the computational tool. Errors were measured using Likert scale. The quantitative results showed errors of less than 1.8% in all the cases studied, concluding that the tool is effective. The qualitative results showed that the methodology allows a better development of the electrostatics learning process, dynamizing the study of complex topics such as electromagnetic physics theories through interactivity and technological resources, in addition to having a theoretical module developed using agile methodologies that provide dynamism and an intuitive environment to the interface.

Beyond the Traditional Analyses and Resource Management in Real-Time Systems

The difficulties in estimating the Worst-Case Execution Time (WCET) of applications make the use of modern computing architectures limited in real-time systems. Critical embedded systems require the tasks of hard real-time applications to meet their deadlines, and formal proofs on the validity of this condition are usually required by certification authorities. In the last decade, researchers proposed the use of probabilistic measurement-based methods to estimate the WCET instead of traditional static methods. In this chapter, we summarize recent theoretical and quantitative results on the use of probabilistic approaches to estimate the WCET presented in the PhD thesis of the author, including possible exploitation scenarios, open challenges, and future directions.

Effects of Collaborative Digital Gameplay on Students’ Three Dimensions of Engagement in Mathematics

This study attempts to provide an in-depth understanding of the influence of collaborative digital gameplay on students’ behavioural, emotional and cognitive engagement in mathematics. This mixed-method study used pre- (N = 45) and post-test (N = 43) engagement surveys and photo-elicitation interviews (N = 6) to investigate how a six-day experiment involving collaborative digital gameplay on Wuzzit Trouble affects students’ engagement in mathematics. The quantitative results showed collaborative digital gameplay did not elicit a significant increase in students’ engagement in mathematics from pre-test to post-test. Moreover, the qualitative results of analyzing the measurement of three-dimensional engagement showed four factors – learning achievement, teacher support, peer collaboration and task characteristics – were associated with students’ engagement in a collaborative digital gameplay classroom. The findings suggest the classroom context plays an important role in three-dimensional engagement, which efficiently improve students’ conceptual understanding and arithmetic skills.

Kultur suspensi sel tanaman gajah beranak (Goniothalamus tapis Miq) terhadap kandungan zat goniotalamin

Zat goniotalamin pada tanaman gajah beranak (Goniothalamus tapis) merupakan obat alternatif penyembuhan kanker. Penelitian bertujuan untuk mendapatkan zat goniotalamin melalui kultur kalus dan kultur suspensi sel. Metode penelitian eksperimen Rancangan Acak Lengkap (RAL) dengan kombinasi 2,4-D (1-10 mgL-1) dan BAP (0,5-2 mgL-1) menggunakan eksplan batang muda, terdiri dari 17 perlakuan dan 3 kali ulangan. Analisis data menggunakan Analysis of Variances dan uji lanjut Duncan Multiple Range Test (DMRT) taraf 5%. Hasil menunjukkan bahwa kultur kalus G. tapis pada media 5,0 mg L-1 2,4-D + 1 mg L-1 BAP adalah yang terbaik dengan waktu muncul kalus 28,33 hari dan persentase pembentukan kalus 100%. Kalus untuk kultur suspensi sel bertekstur remah dan berwarna kuning kehijauan. Kultur suspensi sel menghasilkan pertumbuhan sel yang cepat, tidak lembek berair dan mudah dipisahkan. Hasil kualitatif Kromatografi Lapis Tipis kultur suspensi sel sangat jelas, bersih dan terdapat potensi kandungan zat goniotalamin pada perlakuan 2,4-D 5 mg L-1 + BAP 0,5 mg L-1, 2,4-D 5 mg L-1 + BAP 1 mg L-1, 2,4-D 5 mg L-1 + BAP 2 mg L-1, 2,4-D 10 mg L-1 + BAP 0,5 mg L-1 dan 2,4-D 10 mg L-1 + BAP 1 mg L-1. Hasil kuantitatif zat goniotalamin dengan Kromatografi Cair Prestasi Tinggi terdapat pada perlakuan 2,4-D 5,0 mgL-1 + BAP 1 mg L-1 yaitu 9,57 mg g-1.The goniothalamine compound on Goniothalamus tapis is an alternative cancer medicine. This study aimed to obtain gonotalamin through callus culture and suspension cell culture. The experiment research method was Completely Randomized Design (CRD) with a combination of 2.4-D (1-10 mg L-1) and BAP (0.5-2 mg L-1) using young stem explants consisting of 17 treatments with 3 replications. Data analysis used ANOVA and DMRT at 5%. The results showed that G. tapis callus culture on 5.0 mg L-1 2.4-D + 1 mg L-1 BAP was the best treatment medium with callus emergence time of 28.33 days and percentage of callus formation 100%. The callus used for suspension cell culture was friable and greenish-yellow in color. Suspension cell culture resulted in rapid cell growth, was not fleshy, and easily separated. The quality test by Thin Layer Chromatography (TLC) from suspension cell culture resulted very clear, clean, and potential content of goniothalamin found in treatments 2.4-D 5.0 mg L-1 + BAP 0.5 mg L-1, 2.4-D 5.0 mg L-1 + BAP 1 mg L-1, 2.4-D 5.0 mg L-1 + BAP 2 mg L-1, 2.4-D 10 mg L-1 + BAP 0.5 mg-1 and 2.4-D 10 mg-1 + BAP 1 mg-1. The quantitative results of the best goniotalamine compounds in cell suspension cultures using High-Performance Liquid Chromatography (HPLC) on medium 2,4-D 5.0 mgL-1 + BAP 1 mg L-1 ie 9.57 g-1.

Development and Application of Horticultural Kit for Children’s Horticulture Education

Background and objective: For effective horticultural education, it is required to develop kits for practice. In this study, we developed a horticultural kit for germination that introduces storytelling, characterization, and assembly, and investigated the educational effects of using it to study its educational differentiation and usefulness.Methods: First, we developed a seed germination kit for learning. It consists of three components: the kit main frame for hydroponics, the activity sheet for storytelling, and the instruction manual. It is made into an acrylic assembly in consideration of the ease of delivery for contactless learning. Second, we developed two programs, each using a germination kit for horticultural education (experimental group) and a general germination kit program (control group). At this time, the class consists of pre-questionnaire, the 1st and 2nd classes, observation log writing (total six times for two weeks), the 3rd class, and post-questionnaire. The experimental group and control group were separately executed. Third, the application results were compared and analyzed before and after class. As a quantification questionnaire, the effects before and after class were compared through t-test with a questionnaire on program satisfaction and attitude change toward plants. The quantitative results were analyzed through observation activity sheets and effects before and after the class were analyzed through t-test with quantification and language coding.Results: The effect of horticulture education using the developed kit was estimated by a quantification questionnaire. Both the program satisfaction and the change in attitude toward plants showed high in the experimental group, and this difference was statistically significant (p < .05). As a result of analyzing the observation paper with a qualitative questionnaire, various cognitive and affective expressions appeared in the experimental group as well as the contents of the observation paper. The number of syllables and various qualitative expressions appeared, and these differences were also statistically significant (p < .05).Conclusion: Compared to general germination activities, it was found that the germination activities using storytelling-based horticultural kits would be effective for contactless classes in the post-COVID-19 era and in increasing the educational effect of horticultural activities.