Yashas Mallawarachchi - Academia.edu (original) (raw)

Papers by Yashas Mallawarachchi

The Dissertation was submitted to the Department of Computer Science & Engineering of the Univers... more The Dissertation was submitted to the Department of Computer Science & Engineering of the University of Moratuwa in partial fulfillment of the requirement for the Degree of Master of Business Administration.

Smart Innovation, Systems and Technologies, 2016

“Mahoshadha” the Sinhala Question Answering Systems aims at retrieving precise information from a... more “Mahoshadha” the Sinhala Question Answering Systems aims at retrieving precise information from a large Sinhala tagged corpus. This paper describes a novel architecture for a Question Answering System which summarizes a tagged corpus and uses the summarization to generate the answers for a query. The summarized corpuses are categorized according to a set of topics enabling fast search for information. K-Nearest Neighbor Algorithms is used in order to cluster the summarized corpuses. The query will be tagged, the tagged query will be used to get more accurate results. Through the tagged query the question will be identified clearly with the category of the query. Support Vector Machine is used in order to both automate the summarization and question understanding. This will enable “Mahoshadha” to answer any type of query as well as summarize any type of Sinhala corpus. This enables the Question Answering System to be more useable through many applications.

$Research paper thumbnail of Treatment planning for supracondylar fracture in humerus in children by image processing$

Intelligent Decision Technologies, 2012

Early treatment planning for supracondylar fracture of humerus (SFHs) in children by image proces... more Early treatment planning for supracondylar fracture of humerus (SFHs) in children by image processing research is mainly focus on developing a complete software solution for analysis and diagnosis of SFHs in children as well as provides a pre operational planning is the main objective of this study. However, as the manual process of measurement is usually complex, it is difficult to operate on clinic. This study proposes an effective technique for measuring a fracture angle in digital scan images taken on the personal computer. This approach is particularly promising in the context of find the angle of the fracture because of the high level of children needed in such accuracy in calculation of the fracture angle to fix it. Our goal is accurate detection of fracture angle. In this paper, we present a strategy based on advances in automatic interpretation of images applied to X-ray images scanned in situ. We propose a cognitive vision system that combines image processing, learning and knowledge based techniques with an advance algorithm to solve the problem. This system is illustrated with automatic detection and calculating Cubitus varus deformity at an early stage. We have compared our approach with manual calculation methods and our results showed that automatic processing is reliable. Special attention was paid to high fracture cases, which are crucial to take decisions whether to treat with an operation. The proposed method was validated with the results showing with the manual calculation and an operator can successfully make a measurement within a minute.

Derocrania (Derocrania) concinna Chaudoi... more Derocrania (Derocrania) concinna Chaudoir, 1860 Material examined: &female; (n = 1), (DOZE / UOCSL / LA041), 6.4496°N, 80.4382°E, Sinharaja Rain Forest (Weddagala), Ratnapura District, Sabaragamuwa Province, Sri Lanka, 285 m, 19 August 2020, D.L. Abeywardhana, found on the trunk of a Hora (Dipterocarpus zeylanicus) tree situated close to a walking trail within the forest. Measurements: BW 56.5, BL 16.62, HL 2.40, HW 2.82, ML 2.00, PL 4.46, PW 1.57, PI 2.85, EL 9.76, EW 2.63. Diagnosis and description: Diagnosed at the generic level by small and slender body, large head that is always wider than the elytra in males and more or less equal in females, neck that is not parallel sided, frontal excavation not deep so that there is a very visible separation between the occiput and the neck, prominent eyes, narrow labrum with outward protruding lateral teeth, thin and sharp mandibles, significantly long and thin antennae that are brown in colour with the first two segments black, pronotum slender and narrow with a length/ width ratio of 2.0 to 3.0, elytra are welded but separable and elytral apex is truncated, aedeagus very thin and bent dorsally at the apex. Included in the subgenus Derocrania, as the body length is greater than 14 mm, body robust with a long head, long vertex behind the eyes and transverse sculpture on pronotum. The species can be defined by the long habitus that has a bright non-uniform colour, head black, purple-black long pronotum, short purple elytra, head that has a wide interocular cavity, pronotum with transverse streaks and conspicuous collum, elytra oval with granulated sculpture, red coloured femur with clouded knee, long thin black legs (Fig. 6). Distribution: Kandy, Nalanda, Puttalam (Horn 1904); Kandy (Fowler 1912); Urugalla, Rakwana, Kandy, Balangoda, Nalanda (National Museum Colombo); Haragama, Kandy (HORDI).

Tricondyla (Indotricondyla) granulifera ... more Tricondyla (Indotricondyla) granulifera Motschulsky, 1857 Material examined: &female; (n = 1), (DOZE / UOCSL / LA016), 6.2404°N, 81.3369°E, Kirinda, Hambantota District, Southern Province, Sri Lanka, 4.5 m, 17 March 2018, D.L. Abeywardhana, on branches and trunks of Masan (Ziziphus mauritiana) trees near a reservoir. &male; (n = 1), &female; (n = 2), (DOZE / UOCSL / LA027, DOZE / UOCSL / LA025, DOZE / UOCSL / LA026), 9.1865°N, 80.1501°E, Vellankulam, Mannar District, Northern Province, Sri Lanka, 23.4 m, 5 August 2018, D.L. Abeywardhana, on trunks and branches of mango and cashew trees of a fruit farm. &male; (n = 1), (DOZE / UOCSL / LA029), 9.2239°N, 80.2233°E, Kilinochchi, Kilinochchi District, Northern Province, Sri Lanka, 30.5 m, 25 February 2019, D.L. Abeywardhana, on trunk of tree in a forest. Female Measurements: BW 155.2 – 220.1, BL 22.45 – 24.08, HL 2.43 – 3.53, HW 4.42 – 4.83, ML 2.85 – 3.00, PL 5.01 – 5.92, PW 2.73 – 2.99, PI 1.84 – 2.02, EL 13.24 – 15.31, EW 4.67 – 5.41. Male Measurements: BW 139.5 – 221.7, BL 20.19 – 20.42, HL 3.05 – 3.54, HW 3.92 – 4.45, ML 2.50 – 3.00, PL 4.52 – 4.96, PW 2.62 – 2.79, PI 1.62 – 1.90, EL 11.98 – 12.18, EW 4.15 – 4.46. Diagnosis and description: Diagnosed to generic level by the very large and stout body, large head that is narrower or more or less equal in width to the elytra, parallel sided neck, deep frontal excavation that results in the occiput being more or less at the same level as the neck, less prominent eyes, large and broad labrum, small short and blunt mandibles, antennae short and black with the 3 rd and 4 th segments ringed in red, pronotum robust with a pronotal index of 1.5 to 2.5, elytra welded and inseparable, elytral apex rounded, aedeagus rounded to squared at the base and tapered towards the apex. Included in the subgenus Indotricondyla [...]

FIGURE 6. Derocrania (Derocrania) concinna Female

FIGURE 5. Tricondyla (Indotricondyla) femorata Male

FIGURE 7. Derocrania (Derocrania) halyi Male

Derocrania (Derocrania) scitiscabra (Wal... more Derocrania (Derocrania) scitiscabra (Walker, 1859) Material examined: &male; (n = 2), &female; (n = 1), (DOZE / UOCSL / LA001, DOZE / UOCSL / LA002, DOZE / UOCSL / LA003), 7.3998°N, 80.1760°E, Dambadeniya, Kurunegala District, North-Western Province, Sri Lanka, 69.5 m, 22 September 2017, D.L. Abeywardhana, on trunks of coconut trees in a coconut plantation. &male; (n = 1), (DOZE / UOCSL / LA004), 7.4973°N, 81.2452°E, Thoppigala, Batticaloe District, Eastern Province, Sri Lanka, 522 m, 2 September 2017, A. Thotagamuwa, forest path. &male; (n = 2), &female; (n = 1), (DOZE / UOCSL / LA005, DOZE / UOCSL / LA007, DOZE / UOCSL / LA006), 6.6255°N, 80.6462°E, Opanayaka, Ratnapura District, Sabaragamuwa Province, Sri Lanka, 406.2 m, 5 January 2018, D.L. Abeywardhana, tea estate. &male; (n = 1), &female; (n = 1), (DOZE / UOCSL / LA010, DOZE / UOCSL / LA011), 7.6912°N, 80.2628°E, Mahawa, Kurunegala District, North-Western Province, Sri Lanka, 74 m, 23 February 2018, D.L. Abeywardhana, on trunks of coconut trees in a coconut plantation. &male; (n = 1), (DOZE / UOCSL / LA012), 7.6189°N, 80.5473°E, Malsiripura, Kurunegala District, North-Western Province, Sri Lanka, 182 m, 2 March 2018, D.L. Abeywardhana, on trunks of coconut trees of a pepper and coconut agro-ecosystem. &male; (n = 2), (DOZE / UOCSL / LA013, DOZE / UOCSL / LA014), 6.5851°N, 80.8952°E, Pokunuthanna, Moneragala District, Uva Province, Sri Lanka, 151 m, 15 March 2018, A. Thotagamuwa, forest. &female; (n = 2), (DOZE / UOCSL / LA018, DOZE / UOCSL / LA019), 7.1759°N, 81.2964°E, Bibile, Moneragala District, Uva Province, Sri Lanka, 253.4 m, 15 May 2018, D.L. Abeywardhana, on trees of a home garden and associated area. &male; (n = 1), &female; (n = 1), (DOZE / UOCSL / LA021, DOZE / UOCSL / LA020), 7.7625°N, 81.1555°E, Aralaganwila, Polonnaruwa District, North-Central Province, Sri Lanka, 85.8 m, 13 July 2018, D.L. Abeywardhana, amongst betel vines of a home garden. &female; (n = 1), (DOZE [...]

Tricondyla (Indotricondyla) femorata Wal... more Tricondyla (Indotricondyla) femorata Walker, 1858 Material examined: &male; (n = 1), (DOZE / UOCSL / LA037), 6.0844°N, 80.5442°E, Wilpita Rain Forest, Matara District, Southern Province, Sri Lanka, 45 m, 12 August 2020, D.L. Abeywardhana, on trunk of a tree near a walking trail within the forest. &male; (n = 2), (DOZE / UOCSL / LA038, DOZE / UOCSL / LA039), 6.2514°N, 80.3389°E, Kanneliya Rain Forest, Galle District, Southern Province, Sri Lanka, 36 m, 26 August 2020, D.L. Abeywardhana, on trunks of trees and on walking trail within the forest. Measurements: BW 173.1 – 175.1, BL 23.80 – 24.49, HL 3.42 – 3.89, HW 4.39 – 4.44, ML 2.80 – 3.00, PL 5.81 – 5.91, PW 2.69 – 2.80, PI 2.08 – 2.19, EL 14.57 – 14.99, EW 4.42 – 4.54. Diagnosis and description: Diagnosed at the generic level by the very large and stout body, large head that is narrower or more or less equal in width to the elytra, parallel sided neck, deep frontal excavation that results in the occiput being more or less at the same level as the neck, less prominent eyes, large and broad labrum, small short and blunt mandibles, antennae short and black with the 3 rd and 4 th segments ringed in red, pronotum robust with a pronotal index of 1.5 to 2.5, elytra welded and inseparable, elytral apex rounded, aedeagus rounded to squared at the base and tapers towards the apex. Included in the subgenus Indotricondyla, as the body length is greater than 19 mm, pronotum long and subrectangular with transverse striations, elytra long and subparallel with a weak gibbosity. The species is defined by the elytral sculpture that consists of finely arranged long vermicular transverse wrinkles, transverse streaks on pronotum very fine and thin, body black and shiny with metallic reflections (Fig. 5). Distribution: Nilgiri Hills, Tamil Nadu, South India; Sinharaja, Hayes Deniyaya, Ratnapura, Gilimale, Kandy, Puvakpitiya, Sri Lanka (Naviaux 2002).

Derocrania (Derocrania) schaumi Horn, 18... more Derocrania (Derocrania) schaumi Horn, 1892 Material examined: &female; (n = 1), (DOZE / UOCSL / LA023), 9.1865°N, 80.1501°E, Vellankulam, Mannar District, Northern Province, Sri Lanka, 23.4 m, 5 August 2018, D.L. Abeywardhana, on trunks and branches of mango and cashew trees of a fruit farm. &female; (n = 1), (DOZE / UOCSL / LA034), 6.4323°N, 80.7231°E, Waulpane, Ratnapura District, Sabaragamuwa Province, Sri Lanka, 342 m, 27 June 2019, D.L. Abeywardhana, amongst a cinnamon and pepper cultivation. Measurements: BW 46.5 – 46.7, BL 14.49 – 15.73, HL 1.80 – 1.85, HW 2.06 – 2.07, ML 1.40 – 1.50, PL 4.10 – 4.13, PW 1.54 – 1.56, PI 2.64 – 2.66, EL 8.58 – 9.76, EW 3.17 – 3.20. Diagnosis and description: Diagnosed at the generic level by small and slender body, large head that is always wider than the elytra in males and more or less equal in females, neck that is not parallel sided, frontal excavation not deep so that there is a very visible separation between the occiput and the neck, prominent eyes, narrow labrum with outward protruding lateral teeth, thin and sharp mandibles, significantly long and thin antennae that are brown in colour with the first two segments black, pronotum slender and narrow with a length/ width ratio of 2.0 to 3.0, elytra are welded but separable and elytral apex is truncated, aedeagus very thin and bent dorsally at the apex. Included in the subgenus Derocrania, as body length is greater than 14 mm, body robust with a long head, long vertex behind the eyes, transverse sculpture on pronotum. The species is defined by the bright black smaller body, smooth collum that is not sub-parallel sided, elytra that is wider than the head with sculpture formed by regular polygonal pits over entire surface. Very similar to D. scitiscabra, but differs by the smaller body length and apex which is curved dorsally (Fig. 8). Distribution: Species known only from Sri Lanka. [...]

FIGURE 13. Neocollyris (Stenocollyris) vedda Male Head region

FIGURE 11. Neocollyris (Stenocollyris) vedda Male

FIGURE 3. Tricondyla (Indotricondyla) granulifera Female Dorsal view

FIGURE 12. Neocollyris (Stenocollyris) vedda Male Lateral view

FIGURE 9. Derocrania (Derocrania) scitiscabra Male

FIGURE 4. Tricondyla (Indotricondyla) granulifera Female Lateral view

FIGURE 2. Tricondyla (Indotricondyla) gounellei Male