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For several decades, calligraphy has been popular among people in Japan, China, and even in the world. Traditionally, a teacher teaches how to write letters on a paper with a brush, and a student will imitate them by referring to the model letters. However, if a teacher is not available, this method will not be applicable either. This study aims to propose a calligraphy learning assistant system (CLAS) using projection mapping, which allows a student to learn calligraphy by him/herself.

By following the letter writing video of a teacher that is directly projected on the paper, a student is able to learn the stroke order and writing speed in addition to the letter shape. Moreover, the letter portion practice function is incorporated in CLAS to allow a learner to repeat practicing hard portions of each letter.

For evaluations, the authors implemented CLAS using Raspberry Pi and open-source software and asked students to use it. The results confirmed that CLAS is effective in improving calligraphy skills of novice students.

With CLAS, a student can practice calligraphy using a conventional brush, ink and paper at a desk while looking at the model letter writing of a teacher projected on the paper using projection mapping.

Food waste occurs in every stage of the supply chain, but the value-added lost to waste is the highest when consumers waste food. The purpose of this paper is to understand the food waste behaviour of consumers to support policies for minimising food waste.

Using the theory of planned behaviour (TPB) as a theoretical lens, the authors design a questionnaire that incorporates contextual factors to explain food waste behaviour. The authors test two models: base (four constructs of TPB) and extended (four constructs of TPB plus six contextual factors). The authors build partial least squares structural equation models to test the hypotheses.

The data confirm significant relationships between food waste and contextual factors such as motives, financial attitudes, planning routines, food surplus, social relationships and Ramadan.

The data comes from an agriculturally resource-constrained country: Qatar.

Food waste originating from various causes means more food should flow through the supply chains to reach consumers’ homes. Contextual factors identified in this work increase the explanatory power of the base model by 75 per cent.

Changing eating habits during certain periods of the year and food surplus have a strong impact on food waste behaviour.

A country is considered to be food secure if it can provide its citizens with stable access to sufficient, safe and nutritious food. The findings and conclusions inform and impact upon the development of food waste and food security policies.

This paper aims to investigate the impact of sharia governance on organizational performance in zakat management institutions in Indonesia over the period 2017–2021.

This study examined 33 zakat management organizations in Indonesia from 2017 through 2021 for 151 observations. Gross allocation ratio and growth of ZIS collection are used as organizational performance measures. The independent variables in this study are board of director size, educational background of the board of directors, sharia supervisory board size, sharia supervisory expertise, supervisory size and management size. Also, the study uses size, age and audit opinion as control variables to help measure the relationship between sharia governance and organizational performance.

This study shows that the board of directors and supervisory size positively and significantly affect organizational performance. Then, the educational background of board of directors has a negative and significant effect on organizational performance. In Model 1, sharia supervisory board size has a positive and significant effect on organizational performance, but in Model 2, sharia supervisory board size does not. Meanwhile, sharia supervisory expertise and management board size do not affect organizational performance.

The findings in this study illustrate the importance of transparency in the zakat management organization. Transparency helps minimize conflicts of interest and information asymmetry in the zakat management organization. In addition, sharia governance mechanism helps regulators and top management to make effective policies to improve and enhance organizational performance.

Sharia governance is essential for zakat management organizations to increase accountability, credibility and public trust and support the practice of zakat management organizations.

This study discusses sharia governance and organizational performance in socioreligious organizations, especially zakat management organizations, which are still rarely carried out. Thus, this study broadens the insights of sharia governance and highlights the importance of performance appraisal in zakat management organizations.