Science: Recent submissions

Now showing items 101-120 of 846

Search for dark matter produced in association with a leptonically decaying Z boson in proton-proton collisions at s√= 13 TeV

Jayananda, M.K.; Sonnadara, D.U.J.; Wickramaratne, D.D.C. (Springer, 2021)

A search for dark matter particles is performed using events with a Z boson candidate and large missing transverse momentum. The analysis is based on proton–proton collision data at a center-of-mass energy of 13TeV, collected ...
Identification and characterization of acetic acid bacteria species isolated from various sources in Sri Lanka

Kaumal, M. N.; Perumpuli, P. A. B. N.; Buddhika, M. A. A. (Faculty of Science, University of Peradeniya, Sri Lanka, 2021)

Forty-three acetic acid bacteria (AAB) strains were isolated from different types of fruits, flowers and fermented products collected from different regions of Sri Lanka. They were identified using morphological, ...
Evaluation of Entrance Surface Dose (ESD) for Chest, Lumbar Spine and Abdomen X-ray Procedures in a Selected Hospital in Sri Lanka

Ehalagasthanna, G. P. N. T; Satharasinghe, D.M; Hishaam, U.N; Jeyasugiththan, Jeyasingam (Faculty of Science, University of Colombo, Sri Lanka, 2021)

Ionizing radiation is harmful to living beings because it can break apart biologically important molecules such as DNA. Therefore, it is important to enforce radiation protection where radiation is used in medical diagnosis ...
Effective Radiation Doses for Head and Neck Multi-Slice Computed Tomography (MSCT) Protocols

Karunarathna, Sanjaya; Satharasinghe, D.M; Hishaam, Urshella; Pallewatte, Aruna; Jeyasugiththan, Jeyasingam (Faculty of Science, University of Colombo, Sri Lanka, 2021)

Computed tomography (CT) is known as a standard imaging modality prescribed for head and neck diagnostic imaging. The introduction of multi-detector row CT (MDCT) has enabled imaging of the entire neck region within 2-4 ...
Experimental Study on Tissue Characterization using S Calculation

Hewadikaram, Dulitha K.; Perera, Hasith E.; Wickramrathna, Deshitha C.; Bandara, Muditha S.; Pattivedana, Amal N.; Lakraj, Gamage P.; Jayaweera, Hiran H.E.; Wansapura, Janaka P (General Sir John Kotelawala Defence University – 13th International Research Conference, 2020)

Scientists have theoretically shown that there is a relationship between the size and shape of the scatterers (s) and the bandwidth of the power spectrum (2σ) obtained from ultrasound echoes (RF echoes). The purpose of ...
Nutritional Aspects of Three Termitomyces and Four Other Wild Edible Mushroom Species from Sri Lanka

Gunasekara, Niranjan; Nanayakkara, Chandrika; Karunarathana, Samantha; Wijesundera, Ravi (Chiang Mai University, Faculty of Science, 2021)

Species of Termitomyces are considered as a group of prime edible mushrooms owing to their unique meaty flavour and texture. Nutritional composition data of some species in this genus are scanty due to their rare and ...
Validation of Geant4 Monte Carlo Model of 60Co High Dose Rate BEBIG Brachytherapy Source

Jayakody, M; Jeyasugiththan, Jeyasingam; Chougule, Arun (Faculty of Science, University of Colombo, Sri Lanka, 2021)

The 60Co sources are widely used for high dose rate (HDR) brachytherapy treatments. The purpose of this study is to validate a Geant4 (version10.7.1) computational model of the BEBIG 60Co HDR source. The Geant4 Monte Carlo ...
Estimation of Effective Radiation Dose in 16 Slice Computed Tomography Neck Examination

Gunawardhana, Harshana; Mallikaarachchi, Asanka; Viswakula, Sameera; Jeyasugiththan, Jeyasingam (Faculty of Science, University of Colombo, Sri Lanka, 2021)

Computed Tomography (CT) is the most essential imaging technique and widely used in various diagnostic radiological and interventional procedures in Sri Lanka. Because of the increased demand for CT imaging procedures, ...
Search for top squark pair production using dilepton final states in pp collision data collected at √s = 13 TeV

Jayananda, M.K.; Sonnadara, D.U.J.; Wickramaratne, D.D.C. (European Physical Journal C, 2021)

A search is presented for supersymmetric partners of the top quark (top squarks) in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from b quarks, and missing transverse ...
Population Mean Estimation Using Weight Adjustment for Unit Non-Responses

Jayamanne, I T; Ramanayake, K P A (Malaysian Journal of Mathematical Sciences, 2021)

The population mean is often estimated using the sample mean with no consideration to the design of the survey, the survey errors and biases. Although surveys are properly designed to reduce errors, unit non-response and ...
Radioactivity of sand in the coastal strip from Beruwala to Dondra, Sri Lanka

Bandara, Muditha S; Mahawatte, Palee (Sri Lanka Association for the Advancement of Science, 2013)

All living beings on earth are continuously exposed to radiation from primordial radio nuclides 232Th, 238U and 40K present in soils and sands. Due to their long half lives these radionuclide remain in soils and sands for ...
Transfer of natural radionuclides from soil to Centella asiatica, a medicinal plant grown in Colombo district, Sri Lanka

Chandrasiri, M.R.D.A; Kumari, Peshala; Bandara, Muditha S; Lamabadusuriya, Manuja (27th FAOBMB Conference and 44th Annual Conference of MSBMB, Malaysia, 2019)

Natural radionuclides are taken up by the herbs from the environment and are accumulated in varied concentrations in different parts of the plant. Therefore, it is considered as a type of contaminant in herbal medicines, ...
Feasibility of Sound Touch Elastography Technique to Detect Fibrosis in Chronic Kidney Disease

Bandara, Muditha S; Jayathilake, Champika; Pallewatte, Aruna; Wansapura, Janaka (Peradeniya University International Research Sessions, 2021)

Ultrasound (US) Elastography is a technique that uses low-frequency vibrations to measure the stiffness of the tissues. Liver elastography has shown the appropriability of detecting liver fibrosis which is considered to ...
Assessment of Ultrasound-Based Radiomics as A Marker of Chronic Kidney Disease

Bandara, Muditha S; Jayathilake, Champika; Pallewatte, Aruna; Wansapura, Janaka (Peradeniya University International Research Sessions, 2021)

Radiomics is a technique used to extract a large number of texture features from medical images to support diagnostic decisions using mathematical algorithms. Chronic Kidney Disease (CKD) is one of the major global health ...
A Low-cost Paper-based Microfluidic Impedimetric Device for the Detection of Water Hardness

Kaumal, M. N.; Pitawela, N. R. (Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Tanjungpura, Pontianak, Indonesia 78124, 2021)

A microfluidic paper-based impedimetric device was developed as a water hardness sensor. This device is capable of performing the analysis with a sample volume of a few microliters with no prior treatments. A ...
Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at √s = 13 TeV

Jayananda, M.K.; Sonnadara, D.U.J.; Wickramaratne, D.D.C. (Elsevier, 2021)

Evidence is presented for the electroweak (EW) production of two jets (jj) in association with two Z bosons and constraints on anomalous quartic gauge couplings are set. The analysis is based on a data sample of proton-proton ...
Measurements of production cross sections of polarized same-sign W boson pairs in association with two jets in proton-proton collisions at s√= 13 TeV

Jayananda, M.K.; Sonnadara, D.U.J.; Wickramaratne, D.D.C. (Elsevier, 2021)

The first measurements of production cross sections of polarized same-sign W±W± boson pairs in proton-proton collisions are reported. The measurements are based on a data sample collected with the CMS detector at the LHC ...
Carfilzomib: A Promising Proteasome Inhibitor for the Treatment of Relapsed and Refractory Multiple Myeloma

Jayaweera, Shansa Pranami E.; Kanakanamge, Sacheela Prasadi Wanigasinghe; Rajalingam, Dharshika; Silva, Gayathri N. (Frontiers in Oncology, 2021)

The proteasome is crucial for the degradation of intracellular proteins and plays an important role in mediating a number of cell survival and progression events by controlling the levels of key regulatory proteins such ...
In Silico Characterization and Virtual Screening of GntR/HutC Family Transcriptional Regulator MoyR: A Potential Monooxygenase Regulator in Mycobacterium tuberculosis

Abeywickrama, Thanusha Dhananji; Perera, Inoka C. (2021)

Mycobacterium tuberculosis is a well-known pathogen due to the emergence of drug resistance associated with it, where transcriptional regulators play a key role in infection, colonization and persistence. The genome of ...
Surface engineering of electrodeposited cuprous oxide (Cu2O) thin films: Effect on hydrophobicity and LP gas sensing

Bandara, K.N.D.; Jayathilaka, K.M.D.C.; Dissanayake, D.P.; Jayanetti, J. K. D. S. (2021)

P-type cuprous oxide thin films electrodeposited on a titanium substrate in a lactate bath was investigated for liquid petroleum gas (LPG) sensing. Contact angle measurements using water droplets revealed that the surfaces ...

Now showing items 101-120 of 846

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