Dr. Juni 2012. Faculty of Agriculture. Padjadjaran University (UNPAD); Major in Ecophysiology; Minor in Wood Properties (Disertasi Title : Potency and Distribution of Surian ( Toona sinensis Roem.) and It’s Physical, Mechanical and Macro Anatomical Properties at Various Ecologycal Conditions in West Java) ; Advisor ; Prof. Dr. Aos M. Akyas.

M.Si.  Januari 2007. Forest Sciences. Institut Pertanian Bogor (IPB). Major in Wood Processing; Minor in Wood Drying  (Thesis Title: Equilibrium Moisture Content and Strain/Stress on Woods Drying until Final Drying Process (Over Dry)) ; Advisor: Prof. Dr. Zahrial Coto.

B.S (S.Hut).  Maret 1995. Faculty of Forestry, Institut Pertanian Bogor (IPB); Dept. of Forest Products Technology; Major in Composite Wood; Minor in Particle Board; (Research Title: The Effect of Catalyst and Its Percentage Urea Formaldehyde on Physical and Mechanical Properties of Hevea brasiliensis Muell Particle Board) ; Advisor: Prof. Dr. Yusuf Sudo Hadi.

• Yoyo Suhaya , Anne Hadiyane, Fandi A. Nebo. 2008. The Effect of Boiling And Steaming Surian Wood (Toona Sinensis Roem) To Drying Speed . Wana Mukti Forestry Research Journal Vol. 6 No.1

• Yoyo Suhaya , Vivi Fatmawaty, Perianto Napan. 2007. Phy sical a nd Mechanical Test o f Finger Joint Surian Wood ( Toona Sinensis Roem) . Wana Mukti Forestry Research Journal Vol. 5 No.1

• Yoyo Suhaya , Tanty Erningtyas. 2006. Specific Gravity, Moisture Content and Thickness on African Wood (Maeisopsis eminii). Wana Mukti Forestry Research Journal Vol. 4 No.1

• Yoyo Suhaya , Bambang Subiyanto, Yoshinori Kobayashi. 2005. Wood Drying Method by “Teresan” Process on Sengon Wood ( Paraserianthes falcataria ). Journal of Tropical Wood Science and Technology Vol.3. No.2

• Ihak Sumardi , Yoyo Suhaya. 2003. The Effect of Mixing Acacia mangium Willd. Bark and Wood Particle to Particleboard Quality. Wana Mukti Forestry Research Journal Vol II. No.1

• Bambang Subiyanto, Yoyo Suhaya. 2003. The Effect of Moisture Content And Mixing Ratio of Two Wood Species on Performance of Brick-Wood-Cement (Tayumen). Wana Mukti Forestry Research Journal Vol. I No.2

PRESENTATIONS

INTERNATIONAL CONFERENCE PROCEEDINGS

• Atmawi Darwis, Ihak Sumardi, Yoyo Suhaya, Sopandi Sunarya. 2017. The Vascular Bundles in Surat Bamboo Culm (Gigantochloa pseudoarundinacea).
  The 9th International symposium of Indonesian Wood Research Society (IWoRS). Fahutan UGM bekerjasama dengan IWoRS. Bali-Indonesia

• Yoyo Suhaya , Ihak Sumardi, Atmawi Darwis. 2005. Physical and Mechanical Properties of Teak Wood (Tectona grandis LF.) on Various Age Class (I-VIII). The 6 th International Wood Science Symposium, Denpasar, Bali, Indonesia

• Bambang Subiyanto, Moh. Gopar, Sadrah Devi, Yoyo Suhaya , Kuniharu Yokoo. 2005. Production of Laminated Veneer Lumber (LVL) using Phenol Recorcinol Formaldehyde (PRF). The 6th International Wood Science Symposium, Denpasar, Bali, Indonesia

DOMESTIC CONFERENCE PROCEEDINGS

• Yoyo Suhaya , Aos M. Akyas, Titin Supriatun , Imam Wahyudi. 2012. Potential and Deployment Surian ( Toona sinensis Roem .) In West Java . The 15 th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Makassar, Indonesia

• Yayat Hidayat Yoyo Suhaya. 2012. Genotypic and Phenotypic Correlation between Morphological Characters and Wood Character on Surian (Toona sinensis Roem) . The 15 th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Makassar, Indonesia

• Yoyo Suhaya , Zahrial Coto, Imam Wahyudi. 2009. Equilibrium Moisture Content and Strain/Stress on Woods Drying until Final Drying Process ( Over Dry ) . The 12 th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Bandung, Indonesia

• Ihak Sumardi, Yoyo Suhaya , Tito Trio P. 2009. The Effect of Resin Content and Layer Structure on Physical and Mechanical Properties of Bamboo and Mangium Strandboard. The 12 th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Bandung, Indonesia

• Yoyo Suhaya, Osly Rachman. 2004. Physical and Mechanical Properties of Finger Jointed Wood With LRF (Lignin Resorcinol Formaldehyde ) Resin in Five Wood Species. The 7th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Makasar, Indonesia

• Bambang Subiyanto, Arief Heru Prianto, Yoyo Suhaya , Maryoko Hadi, Yetvi Rosalita. 2004. The Characterization of Bamboo Nail (Dowel) from Bamboo Composite . The 7 th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Makasar, Indonesia

• Bambang Subiyanto, M. Gopar, Sadrah Devi, Yoyo Suhaya. 2004. Production Technology of Laminated Veneer Lumber (LVL) Using Cold Press System . The 7 th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Makasar, Indonesia

• Syamsul Falah, Ihak Sumardi, Yoyo Suhaya. 2004. Extraction of Tannin from Bark of Surian ( Toona Sinensis Merr), Gmelina ( Gmelina arborea Roxb), Ki Hiyang ( Albizia procera Benth.) and Utilization for Adhesive . The 7 th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Makasar, Indonesia

• Yoyo Suhaya , Osly Rachman. 2002. Bending Ability of Some Wood Species and Relation to Anatomical Macros and Physical Properties. The 5th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Bogor, Indonesia

• Bambang Subiyanto, Yoyo Suhaya. 2002. Calibration of Delta-5 Moisture Meter to Eight Indonesian Comercial Species of Wood . The 5 th Annual Meeting of the Indonesian Wood Research Society (IWoRS), Bogor, Indonesia

• Performance Assesment   of Sustainable Production   Forests Management PT. Wanagalang Utama – West Papua (2011).

• Studies on the Utilization of Small Diameter Wood from Plantation Forest and Urban Forest for Laminated Wood Production . Dinas Pekerjaan Umum Propinsi Jawa Timur. (2009)

• Performance Assesment   of Sustainable Production   Forests Management PT. Berkat Cahaya Timber – Center Of Kalimantan (2009).

• Performance Assesment   of Sustainable Production   Forests Management PT. Austral Byna – Center of Kalimantan (2008).

• Performance Assesment   of Sustainable Production   Forests Management PT. Inhutani II Sub Unit Malinau – East Kalimantan (2007).

• Performance Assesment   of Sustainable Production   Forests Management PT. Segara Indochem – East Kalimantan (2006).

• Performance Assesment   of Sustainable Production   Forests Management PT. Keang Nam Development Indonesia – North Sumatera (2005).

• Research for Physical And Mechanical Properties of Teak Wood ( Tectona Grandis LF.) on Various Age Class. Perhutani – Cepu (2004).

• Performance Assesment   of Sustainable Production   Forests Management PT. Parwata Rimba – Center of Kalimantan (2003).

• Studies on The Agroforesry Institution Around Gunung Geulis Forest Area, Sumedang, West Java, Indonesia. Indonesia Ministry of Forestry. (1999-2001).