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The purpose of this paper is to investigate the structural, electronic and optical properties of pure zinc oxide (ZnO) and transition metal (Tm)-doped ZnO using Tm elements from silver (Ag) and copper (Cu) by a first-principles study based on density functional theory (DFT) as implemented in the pseudo-potential plane wave in CASTEP computer code.

The calculations based on the generalized gradient approximation for Perdew-Burke-Ernzerhof for solids with Hubbard U (GGA-PBEsol+U) were performed by applying Hubbard corrections U_d = 5 eV for Zn 3d state, U_p = 9 eV for O 2p state, U_d = 6 eV for Ag 4d state and U_d = 9.5 eV for Cu 3d state. The crystal structure used in this calculation was hexagonal wurtzite ZnO with a space group of P63mc and supercell 2 × 2 × 2.

The total energy was calculated to determine the best position for Ag and Cu dopants. The band structures and density of states show that Tm-doped ZnO has a lower bandgaps value than pure ZnO because of impurity energy levels from Ag 4d and Cu 3d states. In addition, Ag-doped ZnO exhibits a remarkable enhancement in visible light absorption over pure ZnO and Cu-doped ZnO because of its lower energy region and extended wavelength spectrum.

The results of this paper are important for the basic understanding of the 3d and 4d Tm doping effect ZnO and have a wide range of applications in designing high-efficiency energy harvesting solar cells.

Most Asians are directly or indirectly dependent on agriculture, and most live in rural areas. Since Asia is primarily an agricultural economy, rural tourism and agrotourism are critical in enabling growth. Agrotourism is a term that refers to the fusion of tourism and agriculture. The freshwater turtles (Batagur sp.) are a group of six turtles that once roamed southern Asia's great rivers and estuaries from the Indian Subcontinent to the Indonesian islands. Therefore, this review is to investigate the current state of agrotourism in Batagur sp. conservation and assess the associated challenges and opportunities. This review paper recognized the impacts and benefits for the rural site as an agrotourism industry. Moreover, three initiatives in Batagur sp. conservation programs were also discussed. Agrotourism, with a focus on the conservation of Batagur sp., is a vital driver of economic growth in rural Asian regions. It diversifies rural communities' income sources, enhancing economic stability and resilience.

Achieving sustainable development in heart-wrenching milestone in the face of the current pandemic (COVID-19) situation is becoming a key factor for competitiveness of organizations. Human Resource Development professionals are deemed to be in an ideal position to facilitate the organizational sustainable development by bringing about contextual changes in the workplace and by changing the behavioral patterns of employees. The COVID-19 pandemic has engendered the disruption across societies, raising challenges for the organizations besides other institutions to play their imperative role for a sustainable development pathway. One such way of striving by organizations would be to embark among employees a spark of bringing a change among its employees from being self-centered to societal-oriented by instilling among them the kindle of DSIW (Desire to have Significant Impact through Work). It is the desire of making substantial impact toward society and others' lives, which is evoked under ethical leadership and perceived ethical Corporate Social Responsibility (CSR). Thus, we have identified the underpinning values of being an ethical leader in wake of contributing toward the Sustainable Development Goals (SDGs) toward bringing a societal perspective among employees by infusing the altruistic desire, that is, DSIW among employees. This chapter is broadly divided into two main sections. The first section highlights the contextual settings and the underlying mechanisms that lead to DSIW. The second section draws the attention toward the implication of DSIW for employees in bringing about social change with respect to sustainability, social well-being, as well for the sustainable development of organizations and for positive socioeconomic consequences.

Housing has always been a significant aspiration of family expression and distinctly priciest investment by household. It plays a momentous role in the country's economy and so central to the societal well-being that is emplaced in the United Nation Universal declaration of Human rights. Yet in developed and developing world alike, cities struggle to provide decent housing for lower and middle income population. The provision of affordable housing is a major policy concern around the world with Malaysia being no exception; rising income hardly keep pace with price hike of housing unit and housing interventions has majorly concentrated on demand side leading to a non-responsive supply sector. Therefore, this paper highlights affordable housing issues pertaining Malaysia. It formulates Malaysian Map of affordability and conducts an evaluation of global housing schemes to better identify policy priorities for Malaysia. It's significant to harmonize supply and demand side factors in the housing market to ensure that housing supply fits the needs of citizens based on the location, price and target group. In case of Malaysia supply oriented initiative are of urgency in short and medium run. This must be supported by long term demand side schemes in parallel. Convergence of these two factors is essential for a balanced equilibrium and obtaining affordability.

This study aims to examine the issues and challenges in contemporary affordable public housing schemes and proposes an alternative affordable public housing model for low- and middle-income households in Malaysia.

The paper applied qualitative research method. Semi-structured in-depth interviews with four government officials were conducted to understand the provision, framework and working mechanism of selected affordable public housing schemes. A focus group with nine participants was conducted with low- and middle-income households to validate pertaining residential issues and problems in affordable public housing schemes.

The overall findings reveal that the growing plights of unaffordability, poor maintenance and mismanagement have undermined the performance of affordable public housing schemes in Malaysia. The paper indicates that Islamic Public–Private Housing Co-operative Model (IPHCM) possibly has a comparative advantage in its design and operation and therefore can be implemented as an alternative model to address these issues in contemporary affordable public housing schemes in Malaysia. The findings also offer guidelines to government officials and managers of public housing schemes to implement the IPHCM model that can help in reducing the financial burden on low- and middle-income households, improving maintenance work and enforcing effective management practices with residents’ participation.

The paper is limited to develop a new Shariah-compliant affordable public housing model. The paper presents a design and defines the underlying Shariah concept and contracts and their working mechanisms in the proposed model. The paper has not considered other related areas in the development of IPHCM model including Shariah and subject matter expert’s perspective, consumer behavioural intention, legal and regulatory requirements.

The paper has relevance for policymakers and government institutions offering affordable public housing schemes to ensure successful deliverability of sustainable and affordable public housing for low- and middle-income households in Malaysia.

The surging cost of living and shortage of affordable and sustainable homes fuel the global housing crisis. Earthship buildings are marketed as the epitome of affordable and sustainable alternative housing. This paper aimed to elicit the perception of Earthship buildings among youngsters in the United Kingdom using immersive virtual reality technology. Additionally, the impact of virtual reality on perception compared with two-dimensional drawings was investigated in the study.

A three-phase, experiment-based survey was adopted: Phase 1: literature review, Earthship house model conception and the virtual environment creation; Phase 2: two-dimensional drawing-based pre-visualisation survey; Phase 3: virtual reality–based post-visualisation survey.

The findings indicated that youngsters had a remarkable, positive change in attitude towards the uptake of the Earthship houses after virtual reality visualisation. In contrast, sustainability experts shared more concerns regarding the concept's viability in the United Kingdom, even after the virtual reality visualisation. However, both youngsters and experts agreed with the pre-eminence of virtual reality over two-dimensional drawings.

The lack of awareness about Earthship buildings for posterity was noted in previous studies, which could be attributed to there being very few Earthship buildings in the United Kingdom. The importance of this awareness among youngsters cannot be over-emphasised since youngsters are affected most by the shortage of affordable and sustainable homes. This gap was addressed by enlightening the youth about Earthship houses and imparting awareness through near-real-life virtual reality visualisation.

The purpose of this paper is to enhance the efficiency of the LED by introducing three-step magnesium (Mg) doping profile. Attention was paid to the effects of the Mg doping concentration of the first p-GaN layer (i.e. layer close to the active region). Attention was paid to the effects of the Mg doping concentration of the first p-GaN layer (i.e. layer close to the active region).

Indium gallium nitride (InGaN)–based light-emitting diode (LED) was grown on a 4-inch c-plane patterned sapphire substrate using metal organic chemical vapor deposition. The Cp₂Mg flow rates for the second and third p-GaN layers were set at 50 sccm and 325 sccm, respectively. For the first p-GaN layer, the Cp₂Mg flow rate varied from 150 sccm to 300 sccm to achieve different Mg dopant concentrations.

The full width at half maximum (FWHM) for the GaN (102) plane increases with increasing Cp₂Mg flow rate. FWHM for the sample with 150, 250 and 300 sccm Cp₂Mg flow rates was 233 arcsec, 236 arcsec and 245 arcsec, respectively. This result indicates that the edge and mixed dislocations in the p-GaN layer were increased with increasing Cp₂Mg flow rate. Atomic force microscopy (AFM) results reveal that the sample grown with 300 sccm exhibits the highest surface roughness, followed by 150 sccm and 250 sccm. The surface roughness of these samples is 2.40 nm, 2.12 nm and 2.08 nm, respectively. Simultaneously, the photoluminescence (PL) spectrum of the 250 sccm sample shows the highest band edge intensity over the yellow band ratio compared to that of other samples. The light output power measurements found that the sample with 250 sccm exhibits high output power because of sufficient hole injection toward the active region.

Through this study, the three steps of the Mg profile on the p-GaN layer were proposed to show high-efficiency InGaN-based LED. The optimal Mg concentration was studied on the first p-GaN layer (i.e. layer close to active region) to improve the LED performance by varying the Cp₂Mg flow rate. This finding was in line with the result of PL and AFM results when the samples with 250 sccm have the highest Mg acceptor and good surface quality of the p-GaN layer. It can be deduced that the first p-GaN layer doping has a significant effect on the crystalline quality, surface roughness and light emission properties of the LED epi structure.

The majority of Malaysian firms are small and medium-sized enterprises (SMEs), and the hospitality industry is no exception. However, a study on environmental management systems (EMS) reveals that relatively few studies have observed EMS implementation in small and medium-sized enterprises hotels (SMEHs). Hence, this study aims to determine the link between institutional influences and mediating effects of top managers' perceived benefits toward EMS implementation by Malaysian SMEHs.

The results of a questionnaire survey of 252 SMEHs managerial-level professionals using Smart-PLS software provide some explanation for the marginal action taken by these SMEHs to improve their environmental performance.

Based on the findings, five variables might stimulate the implementation of an EMS: regulatory influences, customer influences, competitor influences, employee influences and manager attributes influences.

This study significantly advances understanding of EMS and SMEHs, offering a replicable research framework applicable across industries and countries. Scholars can leverage the framework for further exploration, while managers should recognize institutional influences on EMS implementation.

Given that this study is one of the few that investigates the institutional influences and perceived benefits of EMS implementation, it may provide valuable information for future research on the hospitality industry and the SMEHs among researchers and practitioners.

This study aims to investigate the effects of indium composition on surface morphology and optical properties of indium gallium nitride on gallium nitride (InGaN/GaN) heterostructures.

The InGaN/GaN heterostructures were grown on flat sapphire substrates using a metal-organic chemical vapour deposition reactor with a trimethylindium flow rate of 368  sccm. The indium composition of the InGaN epilayers was controlled by applying different substrate temperatures. The surface morphology and topography were observed using field emission scanning electron microscope (F.E.I. Nova NanoSEM 450) and atomic force microscopy (Bruker Dimension Edge) with a scanning area of 10 µm × 10 µm, respectively. The compositional analysis was done by Energy Dispersive X-Ray Analysis. Finally, the ultraviolet-visible (UV-Vis) spectrophotometer (Agilent Technology Cary Series UV-Vis-near-infrared spectrometer) was measured from 200 nm to 1500 nm to investigate the optical properties of the samples.

The InGaN/GaN thin films have been successfully grown at three different substrate temperatures. The indium composition reduced as the temperature increased. At 760 C, the highest indium composition was obtained, 21.17%. This result was acquired from the simulation fitting of ω−2θ scan on (0002) plane using LEPTOS software by Bruker D8 Discover. The InGaN/GaN shows significantly different surface morphologies and topographies as the indium composition increases. The thickness of InGaN epilayers of the structure was ∼300 nm estimated from the field emission scanning electron microscopy. The energy bandgap of the InGaN was 2.54 eV – 2.79 eV measured by UV-Vis measurements.

It can be seen from this work that changes in substrate temperature can affect the indium composition. From all the results obtained, this work can be helpful towards efficiency improvement in solar cell applications.

The purpose of this paper is to look at the relationships among factors which result in improved knowledge sharing, through the empirical validation of a theoretical model consisting of three dimensions: expected benefit in relation to knowledge sharing, trust at workplace, and employee knowledge‐sharing behavior.

This study targets three technological companies with a total of employees exceeding 1,500 (n=563), utilizing a survey questionnaire as the data collection instrument to test the relationship among the three dimensions. The structural equation modeling approach is used to test the proposed model.

The results show that trust at workplace has a mediating effect on organizational knowledge‐sharing behavior. It is also discovered that there is significant correlation between expected personal benefit through sharing knowledge and the development of trust at workplace.

This study contributes empirical data to the predominantly theoretical literature by offering a deeper understanding of the mediating effect of trust on employee's expected benefit for the purpose of knowledge exchange behavior within teams and among teams.