Current Affiliation Organization 【 display / non-display 】

Current Affiliation Organization 【 display / non-display 】

Academic degree 【 display / non-display 】

Academic degree 【 display / non-display 】

External Career 【 display / non-display 】

External Career 【 display / non-display 】

Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

display all >>

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Mathematical Modelling and Statistical Optimization of Fast Cultivation of Agardhiella subulata: Response Surface Methodology

  M S Islam, Izuru Senaha, Md. Matiar Rahman and Yoshifumi Yoda

  Energy Nexus ( ELSEVIER )  7   2022.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  　View Summary

  The production of algae within a short period has become an emerging issue among researchers due to its diversified usage. At the same time, researchers are working extensively on how to upsurge algae production using carbon dioxide. The motto of this study is to develop a fast algae production system utilizing carbon dioxide and employing mathematical as well as statistical analysis to optimize production. Response surface methodology (RSM) constructed on the central composite design (CCD) was applied to assess the potential contributions of cultivation time, irradiance light, and carbon dioxide concentration during the cultivation process. In addition, their interaction effects were evaluated in the cultivation period. In this study, the cultivation period was the most significant contributor to algae cultivation, followed by light and carbon dioxide. The highest A. Subulata of 0.24 g was attained with 418 μmol/m2/s, 7 days, and 19 mg/l for light intensity, cultivation time, and carbon dioxide concentration, respectively. The experimental data were analyzed using the modified Logistics, modified Gompertz, modified Schnute, and modified Richards models, and it was determined that the modified Logistics model fits the experimental data better than the other three models, as evidenced by the low values of RMSD (0.0286), AIC (-2.409), and BIC (-4.251) and high value of R² (0.98). Increasing algae production employing carbon dioxide will help to promote a sustainable environment and attain sustainable development goals (SDGs).

  • Access this article
    DOI

• A study on heat transfer characteristics by impinging jet with several velocities distribution

  Diop S.N.

  Case Studies in Thermal Engineering ( Case Studies in Thermal Engineering )  26   2021.08 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  • Access this article
    DOI

• Phase equilibrium condition measurements in carbon dioxide hydrate forming system coexisting with seawater

  Nakane R.

  Journal of Chemical Thermodynamics ( Journal of Chemical Thermodynamics )  152   2021.01 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  • Access this article
    DOI

• Relationship Between Photosynthetic Activity and Growth Potential of Red Algae <i>Agardhiella subulata</i>

  KUME Tomoya, SENAHA Izuru, YODA Yoshifumi

  The Proceedings of Conference of Kyushu Branch ( The Japan Society of Mechanical Engineers )  2019 ( 0 ) G31   2019.03

  Type of publication: Research paper (research society, symposium materials, etc.)

  　View Summary

  <p>The influence of photosynthesis on the growth of red algae <i>Agardhiella subulata</i> was investigated. First, changes in photosynthetic activity due to the amount of light irradiated on algae and changes in photosynthetic activity due to addition of CO₂ were tested under a total of 6 conditions including a seawater temperature of 25 °C, light intensity of 75, 150, 250 μmol/(m²·s) and CO₂ addition amount of 0, 15 mg/L. Next, the change in photosynthetic activity by seawater temperature was tested in total 3 conditions including CO₂ not added, light intensity of 150 μmol/(m²·s), seawater temperature of 20, 25, 30 °C. Measurement of the maximum quantum yield <i>F</i>v/<i>F</i>m, which is an indicator of photosynthetic activity, uses chlorophyll fluorescence measurement PAM. <i>F</i>v/<i>F</i>m with the continuous light period <i>L</i>24 h, CO₂ not added, the light intensity of 75 μmol/(m²·s) was the highest, and <i>F</i>v/<i>F</i>m decreased in a short time as the photon quantity increased. The maximum slope was 0.55 at sea water temperature of 25 °C and 30 °C, but the maximum value was 0.44 at 20 °C. In the continuous dark period <i>D</i> 24 h, <i>F</i>v/<i>F</i>m increased by about 0.10 at <i>D</i> 9 h regardless of the number of photons when CO₂ was not added and increased by about 0.10 at <i>D</i> 3 h at a CO₂ addition amount of 15 mg/L. <i>F</i>v/<i>F</i>m is an indicator of photosynthetic activity. It is thought that maintaining this high will lead to the growth of algae. Experimental results show that <i>F</i>v/<i>F</i>m is maintained high by setting the light period to 12 h and the dark period to 3 to 6 h. It was also shown that <i>F</i>v/<i>F</i>m is also affected by the photon quantity and CO₂. From the above it is considered that growth of seaweed can be expected by balancing the light period and the dark period.</p>

  • Access this article
    DOI
  • Search related information
    CiNii Research

• A Sutudy on Promotion of Heat Transfer by Impinging Jet with a Few Amounts of Mist

  UNO Yuki, SENAHA Izuru, YAUSUDA Keita

  The Proceedings of Mechanical Engineering Congress, Japan ( The Japan Society of Mechanical Engineers )  2018 ( 0 ) G0600204   2018

  Type of publication: Research paper (scientific journal)

  • Access this article
    DOI
  • Search related information
    CiNii Research

display all >>

Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• Heat Transfer Enhancement Due to a Longitudinal Vortex Produced by A Single Winglet in A Pipe

  瀬名波出

      1900.01

   

• Heat Transfer Enhancement Due to a Longitudinal Vortex Produced by A Single Winglet in A Pipe

  瀬名波出

      1900.01

   

• 不足膨張噴流が衝突する平板上の温度および圧力分布(第1報,円形噴流が垂直に衝突する場合)

  瀬名波出

      1900.01

   

• Time-Spatial Characteristics of Heat Transfer and Flow in Duct with Turbulence Promoter Located at Various Duct Height

  瀬名波出

      1900.01

   

• Study on Time-spatial Characteristics of Heat Transfer by Visualization of InfraredImage and Dye Flow

  瀬名波出

      1900.01

   

display all >>

Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• Enhancement of Heat Transfer at Downstream of a Backward-Facing Step by Mist Flow

  Yoshitaka Miyafuji , Izuru Senaha ,Kenyu Oyakawa and Munehiko Hiwada

  Int. Conf on Jets, Wakes and Separated Flows  2008.09  -  2008.09 

• Flow Structure and Heat Transfer on Turbulence Field by Oscilating Flag

  Izuru Senaha, Ryota Yamashiro, Masaaki Ishikawa and MD. Didarul Islam

  Int. Conf on Jets, Wakes and Separated Flows  2008.09  -  2008.09 

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Grant-in-Aid for Young Scientists(B)

  Project Year: 2003.04  -  2005.03 

  Direct: 3,300,000 (YEN)  Overheads: 990,000 (YEN)  Total: 4,290,000 (YEN)

SDGs 【 display / non-display 】

SDGs 【 display / non-display 】