http://dr.lib.sjp.ac.lk/handle/123456789/10747 2026-04-23T11:29:41Z http://dr.lib.sjp.ac.lk/handle/123456789/10834 Study on Home Range Size and Pattern among Three Diurnal Non-Human Primates in Mihintale Wildlife Sanctuary in Sri Lanka Kumara, H. W. R.; Nahallage, C. A. D.; Huffman, M. A. The size and pattern of a primate home range depends basically on the availability of distribution of food, the density of the group, free-ranging species and geographical factors. When considering about Sri Lankan primates; Sri Lanka is home to five primate species. Three species belongs to catarrhines, the toque monkey (Macaca sinica), the purple-faced langur (S. vetulus), the grey langur (S. priam thersites) and two or more species of the slender loris (Loris spp.). This study was conducted in Mihinthale wildlife sanctuary and focused on the home range of the toque monkey (Macaca sinica sinica), the purple-faced leaf langur (S. vetulus philbrick), and the grey langur (S. priam thersites). Preliminary observations were started from January 2015 to May of 2015. Intensive data collection was started from May 2015 to September, 2016. Behavioural observations were conducted for 136 days. Three groups were selected randomly to represent all three species for this long term study. Home range data was collected by observations of daily path range of the three species. To determine the actual home range of the three species GPS points and hard copies of maps of the site were used. GIS maps were created to illustrate the area used by each species. The results of the home range sizes of each species indicated that the purple-faced –leaf langur’s home range is the largest among the three species. All macaque groups have a minimum home range when compare with the other two langur species. Macaques mainly depend on human-supplied food and hardly depend on the food from the forest, hence recording the smallest home range among the three primate species. The study concludes that purple - faced leaf langur’s home range is the largest home range than gray langur and toque macaque. Gray langur’s home range is larger than toque macaques and smaller than purple-faced leaf langur. Toque macaque has the smallest home range. The identified two main factors for this difference are the availability of food and the density of groups in the given area. 2019-01-01T00:00:00Z http://dr.lib.sjp.ac.lk/handle/123456789/10830 Efficient Office Assistant Robot System: Autonomous Navigation and Controlling based on ROS Diddeniya, S. I. A. P.; Wanniarachchi, W. K. I. L.; De Silva, P. R. S.; Ganegoda, N. C. 2019-01-01T00:00:00Z http://dr.lib.sjp.ac.lk/handle/123456789/10829 Reduplication: Its Types and Functions in Sinhala Lalith Ananda, M. G. Reduplication can be largely viewed as a subtype of repetition, a pervasive phenomenon of every language affecting all types of linguistic units such as sounds, words, and phrases. It can be also viewed as the systematic repetition of phonological material within a word for semantic or grammatical purposes. The aim of the present paper is to examine reduplication phenomenon in Sinhala1 in the broader spectrum of reduplication patterns and functions evidenced in many languages of the world. Data for the present study consisted of sentences with reduplication types and functions that can be distinguished in Sinhala. A sample of 60 sentences with such reduplication were used. The researcher consulted 05 adult native speakers of Sinhala for their grammaticality judgments about those sentences. The examples and example sentences used in this study are the data used for this purpose. In terms of the main findings of the study, it can be concluded that Sinhala employs reduplication in both of its spoken and written varieties in varying degrees and for various effects. In its written form, reduplication fulfills some stylistic functions and is mostly manifested in poetry, riddles, songs, anecdotes and narrations. The colloquial Sinhala uses reduplication in ordinary discourse and can be seen irrespective of the dialectal varieties. It can be observed at phonological, morphological/morpho-syntactic, and lexical levels. Sinhala manifests reduplication over a broad range of categories such as noun, verb, adjective, and adverb. Nevertheless, Sinhala is quite impoverished when viewed against the broader spectrum of reduplication types, sub-types, functions, and even in the areas of language affected by reduplication as evidenced in many languages of the world. 2019-01-01T00:00:00Z http://dr.lib.sjp.ac.lk/handle/123456789/10828 Development of sodium-ion rechargeable battery using sodium cobalt phosphate cathode Wijesinghe, H. D. W. M. A. M.; Manathunga, C. H.; Perera, V. P. S. Lithium-ion batteries are the most popular kind of rechargeable batteries accommodate in portable electronic devices up to date. As the Lithium deposits are depleting the cost of Lithium-ion batteries is increasing. Sodium- ion batteries can be introduced as an alternative technology which can replace expensive Lithium-ion batteries. Sodium sources are highly abundant and therefore Sodium-ion batteries could be made cheaper than Lithium-ion batteries. A number of cathode materials which were accommodated in Lithium-ion batteries have also been tested as cathode materials for Sodium-ion batteries. This research was based on a Sodium-ion battery which cathode was prepared using Sodium cobalt phosphate. The cathode material was prepared using a simple solid-state reaction between Cobalt (II) oxide and Sodium phosphate. The prepared material was characterized using powder XRD. Chargedischarge cycles, cyclic voltammetry analyzing, impedance curve matching to obtain equivalent circuit was used in order to analyze the performance of the prepared cathode in the battery. The discharge capacity of the cathode was calculated as 9.58 mA h g-1 . The cyclic voltammetry curve has shown that an oxidation and reduction processes involved in the battery cycle but the battery cycle was not completely reversible. 2019-01-01T00:00:00Z