Publications

VPV Munar, MJM De Luna, TJG Go, RB Tumlos (2021). Robustness of a semi-blind deconvolution method applied to Raman spectra with Gaussian and Poisson noises. Proceedings of the Samahang Pisika ng Pilipinas 39, SPP-2021-PB-07 (2021).

Cite

MP Balolong, MBC Amoranto, BA Carandang, RB Tumlos (2021). Putative mutations in selected bacterial housekeeping genes in response to space radiation exposure. Proceedings of the Samahang Pisika ng Pilipinas 39, SPP-2021-PB-19 (2021).

Cite

Darcy L de Asis, Roy B Tumlos, Glenn I Sia Su (2020). Gamma Irradiation for the Inactivation of Aspergillus flavus Link in Copra (Dried Cocos nucifera L. Meat). Philippine Journal of Science.

Cite

John Paul Bustillo, Roy Tumlos, Randal Zandro Remoto (2019). Intensity modulated radiotherapy (IMRT) phantom fabrication using fused deposition modeling (FDM) 3D printing technique. World Congress on Medical Physics and Biomedical Engineering 2018.

Cite

John Paul Bustillo, Roy Tumlos, Randal Zandro Remoto (2018). Intensity Modulated Radiotherapy (IMRT) Phantom Fabrication Using Fused Deposition Modeling (FDM) 3D Printing. World Congress on Medical Physics and Biomedical Engineering 2018: June 3-8, 2018, Prague, Czech Republic (Vol. 3).

Cite

Henry V Lee, Leo Mendel D Rosario, Roy B Tumlos, Henry J Ramos, Luis Ma T Bo-ot, Maricor N Soriano (2018). Excitation of O (1S) auroral green line from ambient air in a microwave-induced plasma jet at atmospheric pressure. Japanese Journal of Applied Physics.

Cite

Alonzo A Gabriel, Ma Luisa P Ballesteros, Leo Mendel D Rosario, Roy B Tumlos, Henry J Ramos (2018). Elimination of Salmonella enterica on common stainless steel food contact surfaces using UV-C and atmospheric pressure plasma jet. Food Control.

Cite

Erin Joy C Tinacba, Julius Andrew Nuñez, Roy B Tumlos, Henry J Ramos (2017). ZnO/Zn and ZnO film deposited via microwave atmospheric plasma jet as photo-catalyst for rhodamine 6G dye degradation. Thin Solid Films.

Cite

Leo Mendel D Rosario, Hernando S Salapare III, Frederic Guittard, Roy B Tumlos, Maricor N Soriano (2017). Topological characterization of plasma-etched polymer surface using discontinuous percolation transition. Materials Chemistry and Physics.

Cite

Leo Mendel D Rosario, HV Lee, Emil Penafiel, Henry J Ramos, Luis Ma T Bo-ot, Reinhard V Fischer, Roy B Tumlos (2017). Characterization of a Microwave-Induced Atmospheric-Pressure Ar--N 2 Plasma Pencil. IEEE Transactions on Plasma Science.

Cite

Alonzo A Gabriel, Richard Paolo M Aba, Daniel Joshua L Tayamora, Julius Ceasar R Colambo, Maria Auxilla T Siringan, Leo Mendel D Rosario, Roy B Tumlos, Henry J Ramos (2016). Reference organism selection for microwave atmospheric pressure plasma jet treatment of young coconut liquid endosperm. Food Control.

Cite

Al Rey C Villagracia, Andres Philip Mayol, Aristotle T Ubando, Jose Bienvenido Manuel M Biona, Nelson B Arboleda, Melanie Y David, Roy B Tumlos, Henry Lee, Ong Hui Lin, Rafael A Espiritu, others (2016). Microwave drying characteristics of microalgae (Chlorella vulgaris) for biofuel production. Clean technologies and environmental policy.

Cite

Alonzo A Gabriel, Maria Chelsea Clarisse F Ugay, Maria Auxilla T Siringan, Leo Mendel D Rosario, Roy B Tumlos, Henry J Ramos (2016). Atmospheric pressure plasma jet inactivation of Pseudomonas aeruginosa biofilms on stainless steel surfaces. Innovative Food Science & Emerging Technologies.

Cite

Henry V Lee, Leo Mendel D Rosario, Martin Francis D Bartolome, Julie S Ting, Roy B Tumlos, Luis Ma T Bo-ot, Henry J Ramos (2015). Temperature calculation for an atmospheric pressure plasma jet by optical emission spectroscopy. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Joey Kim T Soriano, Michael Andrei C Paguio, Leo Mendel D Rosario, Henry Ramos, Roy Tumlos (2015). Optimization of solderability of copper sheet with Sn-Ag-Cu alloy by variations of atmospheric microwave plasma jet (AMPJ) parameters. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Emil Krisnan C Peñafiel, Karol Giuseppe A Jubilo, Hannah Shamina O Cosiñero, Roy B Tumlos, Henry J Ramos (2015). Novel application of a plasma globe as source of chemically reactive dielectric barrier discharge. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Andres Philip Mayol, Aristotle Ubando, Jose Bienvenido Biona, Hui Lin Ong, Rafael Espiritu, Henry Lee, Roy Tumlos, Nelson Arboleda, Alvin B Culaba, others (2015). Investigation of the drying characteristics of microalgae using microwave irradiation. 2015 International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment and Management (HNICEM).

Cite

Julie Anne S Ting, Leo Mendel D Rosario, Henry V Lee Jr, Henry J Ramos, Roy B Tumlos, Reinhard V Fischer (2014). Studies on the use of the coaxial plasma bulb for enhanced wettability of aluminum and polymethylmethacrylate surfaces. Vacuum.

Cite

Leo Mendel D Rosario, Henry V Lee, Julie Anne S Ting, Henry J Ramos, Luis Ma T Bo-ot, Roy B Tumlos (2014). Relationship between excitation and vibrational temperatures and the wettability behavior of plasma treated aluminum. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Julie Anne S Ting, Leo Mendel D Rosario, Henry V Lee Jr, Henry J Ramos, Roy B Tumlos (2014). Hydrophobic coating on glass surfaces via application of silicone oil and activated using a microwave atmospheric plasma jet. Surface and Coatings Technology.

Cite

Leo Mendel D Rosario, Ronniel D Manalo, Jenica Rozette Y Uy, Karel G Pabeliňa, Henry J Ramos, Roy B Tumlos (2014). Enhanced surface energy of a tropical hardwood using a cold atmospheric plasma. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Aren Renz Y Centeno, Leo Mendel D Rosario, Julie Anne S Ting, Henry V Lee, Henry J Ramos, Roy B Tumlos (2014). Enhanced printability of polypropylene sheets via Ar and Ar-N2 plasma treatment using the microwave atmospheric plasma pen (MAPP). Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Michelle Marie S Villamayor, Leo Mendel D Rosario, Rommel Paulo B Viloan, Ma Camille C Lacdan, Julie Anne S Ting, Beverly Anne T Suarez, Shuichi Kato, Roy B Tumlos, Maricor N Soriano, Motoi Wada, others (2013). Observation of plasma-facing-wall via high dynamic range imaging. Plasma and Fusion Research.

Cite

Julie Anne S Ting, Leo Mendel D Rosario, Ma Camille C Lacdan, Henry V Lee Jr, C Jeffrey, Henry J Ramos, Roy B Tumlos (2013). Enhanced adhesion of epoxy-bonded steel surfaces using O2/Ar microwave plasma treatment. International journal of adhesion and adhesives.

Cite

Michael Andrei C Paguio, Leo Mendel D Rosario, Marcedon S Fernandez, Henry J Ramos, Roy B Tumlos (2013). Effect of atmospheric plasma treatment on the solderability of a copper sheet with Sn-Ag-Cu alloy. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Aren Y Centeno, Leo Mendel Rosario, Julie Anne Ting, Henry Lee, Henry Ramos, Daisy Taňafranca, Roy Tumlos (2013). Ar-N₂ plasma treatment of polypropylene sheets via atmospheric microwave plasma pen (AMPP). Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Joey Kim Soriano, Leo Mendel Rosario, Ma Camille Lacdan, Henry Lee, Julie Anne Ting, Henry Ramos, Maria Auxilla Siringan, Roy Tumlos (2012). Fungal sterilization via microwave atmospheric pen plasma (APP). Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Ma Camille Lacdan, Leo Mendel Rosario, Henry Lee, Julie Anne Ting, Henry Ramos, Roy Tumlos (2012). Diagnostics of microwave--induced atmospheric pen plasma. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Leo Mendel Rosario, Julie Anne Ting, Ma Camille Lacdan, Henry Lee, Henry Ramos, Roy Tumlos (2012). Constriction of Ar/N2 plasma flame using tapered nozzles. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Aren Renz Centeno, Henry Lee, Leo Mendel Rosario, Roy Tumlos (2012). Comparison of the output power of a 2.45 GHz continuous wave magnetron using power meter and calorimetric measurements. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Jenica Rozette Uy, Joey Kim Soriano, Camille Faith Romero, Leo Mendel Rosario, Henry Lee, Julie Anne Ting, Henry Ramos, Maria Auxilla Siringan, Roy Tumlos (2012). Bacterial inactivation of Bacillus subtilis using microwave atmospheric pen plasma (APP). Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Erin Joy Tinacba, Julie Anne Ting, Roy Tumlos, Henry Lee, Leo Mendel Rosario, Henry Ramos (2012). Atmospheric microwave plasma cleaning of oil-contaminated aluminum surface. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Ma Camille Lacdan, Leo Mendel Rosario, Henry Lee, Julie Anne Ting, Henry Ramos, Roy Tumlos (2011). Temperature profiles of quartz discharge tubes containing microwave plasma jets of argon. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Tracy Estella Tuballa, Ma Camille Lacdan, Joey Kim, Julie Anne Ting, Henry Lee, Leo Mendel Rosario, Henry Ramos, Roy Tumlos, others (2011). Superhydrophilic stainless steel via fast treatment with atmospheric-pressure Ar/N2 microwave plasma jet. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Roy Tumlos, Julie Ting, Elias Osorio, Leo Rosario, Henry Ramos, April Ulano, Henry Lee, Gladys Regalado (2011). Results of the study of chemical-, vacuum drying-and plasma-pretreatment of coconut (Cocos nucifera) lumber sawdust for the adsorption of methyl red in water solution. Surface and Coatings Technology.

Cite

Joey Kim Soriano, Leo Mendel Rosario, Henry Lee, Ma Camille Lacdan, Julie Anne Ting, Henry Ramos, Roy Tumlos (2011). Reflected power measurements on microwave plasma jets contained in different dielectric tubes. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Julie Anne Ting, Jeffrey De Vero, Leo Mendel Rosario, Henry Ramos, Roy Tumlos (2011). Optical emission spectroscopic studies of an O2/Ar microwave plasma in correlation to surface wettability. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

Leo Mendel D Rosario, Julie Anne S Ting, Rommel Paulo B Viloan, Beverly Anne T Suarez, Michelle Marie S Villamayor, Roy B Tumlos, Maricor N Soriano, Henry J Ramos (2011). High dynamic range imaging of magnetized sheet plasma. IEEE Transactions on Plasma Science.

Cite

Erin Joy Tinacba, Julie Anne Ting, Leo Mendel Rosario, Roy Tumlos (2011). Enhancement of paint adhesion of stainless steel treated by argon microwave plasma jet. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

JA Ting, MC Lacdan, H Ramos, LM Rosario, R Tumlos, others (2011). Enhanced Adhesion of Epoxy on a Stainless Steel Surface Treated with O $$sub 2$$/Ar Microwave Plasma.

Cite

Henry V Lee, Marko E Arciaga, Leo Mendel Rosario, Julie Anne Ting, April Ulano, Roy B Tumlos, Henry J Ramos (2011). A 2.45-GHz microwave air plasma under a double-hexapole magnetic field. IEEE Transactions on Plasma Science.

Cite

Larry Q Reyes, Julie Anne S Ting, Henry J Ramos, Roy B Tumlos, Roland V Sarmago (2010). O₂ plasma treatment of electrospun Hydroxyapatite/Chitosan-PCL bioscaffold for bone tissue engineering. Proceedings of the Samahang Pisika ng Pilipinas.

Cite

JAS Ting, LMD Rosario, AM Ulano, HV Lee Jr, HJ Ramos, RB Tumlos, others (2010). Enhancement of chromium (VI) removal by pre-treatments of cocolumber (Cocos nucifera) sawdust: vacuum drying and plasma treatments. World Applied Sciences Journal.

Cite

L Rosario, R Viloan, M Villamayor, H Ramos, R Tumlos (2009). Influence of deposition parameters on the properties of composite TiN/a C films. Book of abstracts.

Cite

Marko Arciaga, Roy Tumlos, April Ulano, Henry Lee Jr, Rumar Lledo, Henry Ramos (2008). Development of a simple 2.45 GHz microwave plasma with a repulsive double hexapole configuration. Review of Scientific Instruments.

Cite

Leo Mendel Rosario, Roy Tumlos (2004). Calorimetric Measurements of the Output Power of the 2.48 GHz Commercial Magnetron. Science Diliman.

Cite

RB Tumlos, BD Blackwell, J Howard (1998). Mapping the vacuum magnetic surfaces in heliac H-1NF using techniques in tomography. Helical system research.

Cite

BD Blackwell, RB Tumlos, J Howard (1997). High-resolution tomographic imaging of vacuum magnetic surfaces in the H-1 heliac. Review of scientific instruments.

Cite

BD Blackwell, RB Tumlos, J Howard (1995). High resolution electron beam wire tomography on the H-1 heliac.

Cite

MG SHATS, RB Tumlos, G WARR, BC ZHANG, WA COOPER, PR GARABEDIAN, T HAYASHI (1995). FIRST EXPERIMENTAL RESULTS AND RECENT MHD STUDIES FOR THE H-1 HELIAC BD BLACKWELL, GG BORG, RL DEWAR, HJ GARDNER, SM HAMBERGER, J. HOWARD, D. RUDAKOV, LE SHARP.

Cite

BD Blackwell, GG Borg, RL Dewar (1995). First experimental results and recent MHD studies for the H-1 heliac. Plasma physics and controlled nuclear fusion research 1994. V. 2. Proceedings of the fifteenth international conference.

Cite

Roy Bienes Tumlos, others (1994). Studies of vacuum magnetic surfaces in H-1 using tomography. The Australian National University.

Cite

BD Blackwell, GG Borg, RL Dewar, HJ GARDNER, SM HAMBERGER, J Howard, D RUDAKOV, LE SHARP, MG SHATS, RB Tumlos, others (1994). IAEA-CN-60/A6/CP-4.

Cite

MG SHATS, DL Rudakov, BD Blackwell, LE SHARP, R Tumlos, SM HAMBERGER (1994). Experimental study of magnetic islands on the H-1 heliac. Europhysics Conference Abstracts.

Cite

MG SHATS, DL Rudakov, BD Blackwell, LE SHARP, R Tumlos, SM HAMBERGER, OI Fedyanin (1994). Experimental investigation of the magnetic structure in the H-1 heliac. Nuclear fusion.

Cite

BD Blackwell, J Howard, RB Tumlos (1992). Tomographic wire-grid imaging of magnetic surfaces. Review of scientific instruments.

Cite

RB Tumlos, BD Blackwell, TY Tou, J Howard (1991). Mapping of magnetic surfaces in a toroidal heliac.

Cite