The subjective well-being (SWB) concept specific to the elderly Orang Asli is still vague, with limited research. Understanding SWB can give a holistic picture of elderly Orang Asli’s well-being status because SWB considers individual evaluations and perspectives based on life experiences in various dimensions relevant to the elderly Orang Asli’s culture, language, belief system, and lifestyle. Therefore, this paper aims to explore the concept of SWB of elderly Orang Seletar. An exploratory case study research design is implemented in this qualitative study. 15 informants who participated in an in-depth interview session in Kampung Bakar Batu Perling, Johor Bahru, and aged 50 years old and above. Based on the findings of the study, there were seven major themes in discussing the concept of SWB which are (i) sufficiency; (ii) comfort; (iii) satisfaction; (iv) preference/favorite; (v) happiness; (vi) tranquillity and (vii) awareness. The finding of the study shows that there were eight domains of SWB of elderly Orang Asli Seletar which are (i) physical health; (ii) mental health; (iii) family and community; (iv) sea and nature; (v) culture preservation; (vi) basic needs; (vii) education; and (viii) spiritual. In conclusion, SWB should be the core element to determine the development of elderly Orang Seletar to ensure their thrive. From mainstream society’s eye, elderly Orang Seletar’s lives may be seen as inadequate and modest. However, it is different from what is felt by them.

This article identifies the role of anti-corruption legislation in sustainable development. The descriptive approach is used to achieve the research objectives, as it is the appropriate scientific method suitable for the nature of the study subject in terms of presenting information related to combating administrative corruption. The results indicate that efforts to combat administrative corruption to achieve sustainable development in countries can only be achieved through strict legislation specialized in combating administrative corruption with the activation of accountability mechanisms in all state departments, bodies, and ministries. The results also demonstrate the alignment of the national and international efforts to reduce the phenomenon of corruption through international agreements and treaties. Towards the end, key conclusions and recommendations are also appropriately incorporated.

The paper examines the underlying science determining the performance of hybrid engines. It scrutinizes a full range of orthodox gasoline engine performance data, drawn from two sources, and how it would be modified by hybrid gasoline vehicle engine operation. The most significant change would be the elimination of the negative consequences of urban congestion, stop-start, and engine driving, in favour of a hybrid electric motor drive. At intermediate speeds there can be other instances where electric motors might give a more efficient drive than an engine. Hybrid operation is scrutinised and the electrical losses estimated. There also remains scope for improvements in engine combustion. 

Xylene isomers are notorious chemical hazards, and their efficient removal from water solutions is still challenging. The current study reports a polymer nanocomposite as a potential adsorbent for successfully removing dissolved xylene isomers from contaminated water. Polystyrene-1D multiwall carbon nanotube nanocomposite (PS-MWCNT) adsorbent was prepared using the one-step bulk polymerization method. Mesoporous PS-MWCNT was prepared using the nano-crystallization phase separation method. The sulfonation of the mesoporous PS-MWCNT nanocomposites was carried out by treating the samples with concentrated sulfuric acid at elevated temperatures. The sulfonated PS-MWCNT (HO₃S-PS-MWCNT) was found to be a potential adsorbent for dissolved xylene isomers from water solution. In addition, the HO₃S-PS-MWCNT can be efficiently recycled for up to 10 consecutive cycles with negligible decline in adsorption values. The exhibited equilibrium adsorption, rate of adsorption, and rapid regeneration of the HO₃S-PS-MWCNT are clear indications for the possibility of practical utilization of these adsorbents in large-scale water treatment plants.

Tropical dry forests are complex and fragile ecosystems with high anthropogenic intervention and restricted reproductive cycles. They harbor unique richness, structural, physiological and phenological diversity. This research was carried out in the upper Magdalena valley, in four forest fragments with different successional stages. In each fragment, four permanent plots of 0.25 ha were established and the light habitat associated with species richness, relative abundance and rarity was evaluated, as well as the forest dynamics that included mortality, recruitment and diameter growth for a period of 5.25 years. In mature riparian forest, species richness was found to be higher than that reported in other studies for similar areas in the Cauca Valley and the Atlantic coast. Values of species richness, heterogeneity and rarity are higher than those found in drier areas of Tolima. Forest structure, diversity and dynamics were correlated with light habitat, showing differences in canopy architecture and its role in the capture and absorption of radiation. The utilization rate of photosynthetic effective radiation in the forest underlayer with high canopy density is low, which is related to the low species richness, while the underlayer under light is more abundant and heterogeneous.