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This study aims to present a numerical study of atomic structure for aluminium nitride (AlN) when the crystal was assumed grown on different orientation of sapphire substrate. The change of the AlN atomic structure with sapphire orientation was associated to the interface between the AlN and the sapphire. The results from this study would provide a guideline in selecting suitable orientation of sapphire for obtaining desirable AlN crystals, in particular, for reducing threading dislocation density in the AlN/sapphire templates for developing UV LEDs.

The approach of atomic structure by visualization for electronic and structural analysis numerical method to develop shape of atomic geometry to evaluate which plane are more suitable for the AlGaN technology UV-LED based.

The calculation based on ratio on first and second layers can be done by introduction of lattice constant.

With plane’s color of cutting plane on bulky materials, all the shape looks the same.

By implementing this method, the authors can save time to find the most suitable plane on the growth structure.

All authors of this research paper have directly participated in the planning, execution or analysis of the study; all authors of this paper have read and approved the final version submitted; the contents of this manuscript have not been copyrighted or published previously; the contents of this manuscript are not now under consideration for publication elsewhere; the contents of this manuscript will not be copyrighted, submitted or published elsewhere, whereas acceptance by the journal is under consideration.

Vertical-cavity surface-emitting laser (VCSEL) is a high-performance semiconductor device made of unique epitaxial layers grown on n-type GaAs or InP substrates. The VCSEL’s thermal resistance, Rth, is an essential metric that reflects its thermal properties and dependability. The purpose of this paper is to develop packaging for 1 mm² VCSEL chips made of a variety of materials, such as ceramic, lead frame and printed circuit board (PCB)-based packaging, as well as provide an idea or design that can withstand and perform well in terms of Rth and heat dissipation during operation. SolidWorks 2017 and AutoCAD Mechanical 2017 software were used to publish all thoughts and ideas, including the size dimensions (x, y and z) and material choices for each package.

Following the modelling and material selection, the next step is to use the Ansys Mechanical Structural FEA Analysis software to simulate all packaging for Rth and determine which packaging produced the best result, therefore, determining the heat dissipation for each packing. All parameters were used based on the standard cleanroom requirement for the industrial manufacturing backend process, where the cleanroom classification is 10,000 particles (ISO 7). The results demonstrated that the ceramic and lead frame provided good Rth values of 7.3 and 7.0 K/W, respectively, when compared to the PCB, which provided more than 80 K/W; thus, the heat dissipation for PCB packaging also increased.

As a result of the research, it was determined that ceramic and lead frame packaging are appropriate and capable of delivering good Rth and heat dissipation values when compared to PCB. In comparison to PCB, which requires numerous modifications, such as adding via holes and a thermal bar in an attempt to lower the Rth value, neither packaging requires improvement. Ceramic was chosen for development based on Rth's highest performance, with the actual device consisting of a lead frame and PCB. The Zth measurement test was carried out on a ceramic package, and the Rth result was comparable to the simulation result of 7.6 K/W, indicating that simulation was already proved for research and development.

The purpose of this study is to determine which proposed packaging design would give the highest Rth performance of a 1 mm² chip as well as the best heat dissipation. In comparison to other studies, VCSEL packaging used the header and window cap as package components with a wavelength of 850 nm, and other VCSEL packaging developments used the sub mount on ceramic package with an output power ranging from 500 mW to 2 W, whereas this study used a huge wavelength and an output power of 4 W.

The purpose of this study is to demonstrate a pseudomorphic High Electron Mobility Transistor (pHEMT) cutoff frequency (f_T) and maximum oscillation frequency (fmax) are determined by the role of its gate length (Lg). Theoretically, to obtain an Lg of 1 µm, the gate’s resist opening must be 1 µm wide. However, after the coat-expose-develop (C-E-D) process, the Lg became 13% larger after metal evaporation. This enlargement is due to both resist thickness and its profile.

This research aims to optimize the 1-µm Lg InGaAs-InAlAs pHEMT C-E-D process, where the diluted AZ®nLOF™ 2070 resist with AZ® EBR solvent technique has been used to solve the Lg enlargement problem. The dilution theoretically allows the changing of a resist thickness to different film thickness using the same coating parameters. Here, for getting a new resist, which is simply called AZ 0.5 µm, the experiment’s important parameters such as the coater’s spin speed of 3,000 rpm and soft bake at 110°C for 5 min are executed.

The newly mixed AZ 0.5 µm resist has presented a high resolution and undercut profile rather than standard AZ 1 µm resist. Hence, the Lg metallization after using AZ 0.5 µm optimized process showed better results than AZ 1 µm which used the standard process.

The outcome of the optimization has reached that it is possible to get a nearly sub-µm range gate’s opening using a diluted resist, and at the same time retaining a high resolution and undercut profile.

The purpose of this paper is to investigate the relationship between employee happiness at work and organizational citizenship behaviour in Indian private sector banks. In this study, happiness at work is represented by three constructs: job satisfaction, affective commitment and work engagement. The study also investigates whether employees’ perception of diversity management practices mediates the relationship between happiness at work and organizational citizenship behaviour.

A total of 498 responses from employees of three major private sector banks in the Delhi-NCR region were analysed to investigate relationships between dependent, independent and mediating variables by using structural equation modelling.

Happiness at work has a significant positive impact on organizational citizenship behaviour, and employees’ perception of diversity management plays a strong mediating role between the relationship of happiness at work and organizational citizenship behaviour.

Happiness at work and perception of diversity management have a significant influence on organizational citizenship behaviour of banking employees. Private sector banks in India need to make strategies for workplace happiness and diversity management so that the employees work as citizens of the bank and willingly take responsibility for extra-role behaviour along with their assigned roles.

The findings of this paper reveal that although employees may experience happiness at work represented by job satisfaction, affective commitment and work engagement, their happiness is less likely to be reflected in their organizational citizenship behaviour until they have a positive perception of the workforce diversity management practices. To the best of the authors’ knowledge, this study is unique in terms of its emphasis on the mediating role of diversity management on employees’ happiness and organizational citizenship behaviour in Indian private sector banks.

The study aims to conduct a critical analysis of available economic tools to value non‐market rural tourism products and services, and assess the strengths and weaknesses of these tools.

The paper reviews existing valuation methods to better understand how estimates of rural tourism products and services are conducted. The paper also critically evaluates the applicability of these methods.

The study concludes that the selection of a method is mainly based on applicability of the approach. In assessing the non‐market value of rural tourism products and services, a method is selected by identifying its strengths and weaknesses. A review of previous studies suggests the evaluation of the practicality of each method according to the topic studied.

The paper contributes to a better understanding of available valuation approaches that give reliable estimates on non‐market rural tourism products and services.

This paper aims to examine whether happiness at workplace (HAW) impacts organisational citizenship behaviour (OCB) and whether this impact can be further improved by promoting learning capabilities in organisations, thus investigating the mediating role of organisational learning capabilities (OLC).

This study was conducted on knowledge-intensive workers (employees of EdTech companies) in India. Responses were collected via questionnaire in online mode, and after discarding the incomplete responses, 500 replies were considered for data analysis with PLS-SEM technique.

The outcomes reveal that the HAW has a significant influence on OCB. The outcomes also reveal that this impact is further enhanced with the presence of OLC, thus confirming that OLC operates as a mediator in the link connecting HAW and OCB.

This study makes a distinctive contribution by bringing out the significance of workplace learning in the connection between the workplace happiness and citizenship behaviour of employees that will provide impetus to the practitioners to formulate strategies in such a manner that the employees voluntarily perform the actions beyond their designated roles.

The purpose of this study is to analyze the properties of Happiness at Workplace (HAW) scale and investigate the validity of the scale in the Indian context using a sample of EdTech employees (knowledge-intensive population). This is consistent with encouraging the happiness literature as well as facilitating positive approaches at the working place in developing economies.

Responses were collected via Questionnaire from the employees of EdTech Companies, and a total of 500 responses were investigated. The factor structures, reliability and validity of the HAW scale were tested with the help of SPSS and Smart PLS Software Version 4.0.8.7.

The findings of this study showed that all the criteria of reliability and validity for validation of HAW scale were met when used in Indian culture, and the higher-order construct of HAW scale was retained.

Because of the differences in work cultures and societal structures among nations, the validation of HAW scale in the Indian context is needed, as the majority of the studies in the field of happiness were conducted in Western countries. So this study contributes significantly by validating the HAW scale in India by using a sample of EdTech employees.

In this advanced era of Industrial Revolution 4.0, as an element of cyber physical systems, the Internet of Things (IoT) has been applied in many different industries; however, its adoption in the construction industry is still limited to a few applications. This study uncovers, identifies and assesses the challenges of adopting IOT in construction projects. The challenges have been identified through the briefed literature review and a survey instrument from construction industries in Malaysia.

In this study, the quantitative research approach has been used and data have been collected through a questionnaire survey for construction practitioners. Whereas, respondents to the questionnaire are practitioners from the Malaysian construction industry. The method of sampling implied is random sampling technique whereby the final sample size is 132 participants. Moreover, the gathered data has been analysed using univariate approach via standard deviation and average index in SPSS Software 22.0.

The results of this study indicated the most dominant challenges are lack of safety and security, lack of documented standards, lack of benefit awareness, improper introduction of IOT and lack of robustness in connectivity. This study also examined that the awareness of construction practitioners toward the understanding of IOT and its possibility to be applied and extended in construction projects and determined that construction practitioners are aware of IOT benefits to improve the efficiency of construction projects.

The study presents a better understanding of IOT in the construction industry and their potential challenges, which helps the construction policymakers to avoid encounters related to challenges and provide education-based campaigns to educate construction practitioners on the concept and importance of using IOT in the construction sector.

This is a unique study because of its nature in this advance era of industry 4.0. Furthermore, it is specifying the latest trend associated with IOT in the construction industry and addressing the challenges of implementation, which is crucial to exploit and take advantage of the full potential of IoT benefits.

The momentous contribution of innovative technologies has made a significant impact in several sectors globally. However, the construction industry is undoubtedly lagging when it comes to technology usage. Thus, this study aims to explore the various emerging technologies in the construction industry while noticing stakeholders’ challenges and strategies in its use.

The study used a pragmatism research philosophy together with a quantitative research strategy in determining emerging technologies in the construction industry while noticing stakeholder challenges and strategies. Data were obtained from a total of 80 construction stakeholders through a structured questionnaire survey. The analysis was done with descriptive statistics using mean score ranking and a one-sample t-test.

Each emerging technology challenge was analysed and compared to see how pressing the challenges were as well as the aligned strategies. A key indication of this study is that the familiarity of the various emerging technologies was based on how many occasions one had an encounter with the technology.

The discussion’s findings contribute to a better knowledge to construction stakeholders on the challenges and strategies for rising technology adoption and implementation competencies.

The study reckoned stakeholders’ challenges on the emerging technologies in the construction industry context and recommended strategies to balloon the adoption of these emerging technologies in a developing country setting.