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A Case Study of Risk Assessment of Ozone Impact on Forest Tree Species in Japan
Watanabe, Makoto,Yamaguchi, Masahiro,Matsumura, Hideyuki,Kohno, Yoshihisa,Koike, Takayoshi,Izuta, Takeshi Korean Society for Atmospheric Environment 2011 Asian Journal of Atmospheric Environment (AJAE) Vol.5 No.4
Ozone ($O_3$) is a main component of photochemical oxidants and a phytotoxic air pollutant. Although the current levels of tropospheric $O_3$ in East Asia could adversely affect productivity of forest tree species, risk assessments of $O_3$ impact were limited. In this paper, we summarize the methodology of risk assessment of $O_3$ on forest tree species based on our two previous studies, risk assessments of $O_3$ impact on the growth of Fagus crenata by Watanabe et al. (2012) and on the annual carbon absorption of three representative conifers, Cryptomeria japonica, Pinus densiflora and Larix kaempferi by Watanabe et al. (2010). $O_3$ sensitivity of each tree species obtained from an experimental study, $O_3$ exposure and atmospheric N deposition based on field monitoring and vegetation survey were integrated by geographic information system method. Based on the results, we conclude that the area with high risk of $O_3$ impact does not necessarily correspond to the area with high $O_3$ exposure. The varieties of tree habitat, tree sensitivity to $O_3$ and annual carbon absorption among the tree species, and N deposition-induced change in the $O_3$ sensitivity of F. crenata are raised as the factors of discordance between areas with high risk and those with high $O_3$ exposure. In the last part of this paper, we discuss the present uncertainty and perspectives of risk assessment for the future studies on the impact of $O_3$ on forest tree species in East Asia.
A Case Study of Risk Assessment of Ozone Impact on Forest Tree Species in Japan
Makoto Watanabe,Masahiro Yamaguchi,Hideyuki Matsumura,Yoshihisa Kohno,Takayoshi Koike,Takeshi Izuta 한국대기환경학회 2011 Asian Journal of Atmospheric Environment (AJAE) Vol.5 No.4
Ozone (O_3) is a main component of photochemical oxidants and a phytotoxic air pollutant. Although the current levels of tropospheric O_3 in East Asia could adversely affect productivity of forest tree species,risk assessments of O_3 impact were limited. In this paper, we summarize the methodology of risk assessment of O_3 on forest tree species based on our two previous studies, risk assessments of O_3 impact on the growth of Fagus crenata by Watanabe et al. (2012) and on the annual carbon absorption of three representative conifers, Cryptomeria japonica, Pinus densiflora and Larix kaempferi by Watanabe et al. (2010). O_3 sensitivity of each tree species obtained from an experimental study, O_3 exposure and atmospheric N deposition based on field monitoring and vegetation survey were integrated by geographic information system method. Based on the results, we conclude that the area with high risk of O_3 impact does not necessarily correspond to the area with high O_3 exposure. The varieties of tree habitat, tree sensitivity to O_3 and annual carbon absorption among the tree species, and N deposition-induced change in the O_3 sensitivity of F. crenata are raised as the factors of discordance between areas with high risk and those with high O_3 exposure. In the last part of this paper, we discuss the present uncertainty and perspectives of risk assessment for the future studies on the impact of O_3 on forest tree species in East Asia.
2-D Adaptive Line Enhancer using A New Lattice Structure
Watanabe, Noritaka,Nakachi, Takayuki,Hamada, Nozomu 대한전자공학회 1996 APCCAS:Asia Pacific Conference on Circuits And Sys Vol.1 No.1
In this paper, we propose a two-dimensional (2D) adaptive line enhancer (ALE) using a new lattice structure. The new lattice filter implementation of an ALE has superior convergence because of its orthogonality of backward prediction error fields. We discuss a method of determinig the so-called iecorrelation parameters so that periodic signal is strongly emphasized than the colored noise. Simulations are demonstrated to examine the validity of the proposed theory.
Watanabe, R .,Mizuno, Y .,Kawasaki, A . 대한금속재료학회(대한금속학회) 1999 METALS AND MATERIALS International Vol.5 No.2
An in-situ monitoring system for sintering shrinkage was devised to study the nonuniform deformation of injection moulded powder compacts. The monitoring system is based on the digital image correlation method and has a modified image processing software compared to the conventional method. The system consists of a bell-type sintering furnace and an optical image processing set-up, enabling one to measure two- and three-dimensional changes in the compacts during sintering on a non-contact and real time basis. Nonuniform and anisotropic sintering shrinkage was precisely determined for two types of complex-shaped powder compacts of stainless steel (SUS304) prepared by metal injection moulding at room temperatures up to 1543 K.
Hybrid Municipal Wastewater Treatment System With Pre-Coagulation/Sedimentation
Watanabe, Yoshimasa,Itonaga, Takanori 한국공업화학회 2004 Journal of Industrial and Engineering Chemistry Vol.10 No.1
Since the major part of the contaminants in municipal wastewater is associated with particles, direct particles separation is an effective way of lowering the wastewater contaminants. This paper deals with the performance of the hybrid municipal wastewater treatment system consisting of pre-coagulation/sedimentation and post-biological oxidation process. Rotating biological contactor and membrane bio reactor are used as biological oxidation process.
Watanabe Takuma,Yokoyama Atsushi,Shimizu Satoshi,Bessho Kazuhisa 대한구강악안면외과학회 2022 대한구강악안면외과학회지 Vol.48 No.4
A ranula is a pseudocyst that originates from the sublingual gland after trauma. Acute cases of ranulas that progress rapidly and cause respiratory dis-tress are rare. Holoprosencephaly is a complex brain malformation caused by incomplete cleavage of the prosencephalon. Children with holoprosen-cephaly may experience upper airway obstruction due to the associated dentoalveolar malformations and oromotor dysfunctions. We present the case of an eight-year-old female patient with holoprosencephaly and a plunging ranula that manifested as an acute course due to difficult airway management. She required gastrostomy for oromotor dysfunctions related to feeding and swallowing and difficulty managing oral secretions. The sublingual gland and ranula were removed under general anesthesia. Postoperatively, urgent reintubation and close monitoring in the intensive care unit were required due to upper airway obstruction. We successfully managed the patient with close cooperation of a pediatrician and an anesthetist, and no recurrence was observed at the one-year follow-up. A ranula can be caused by trauma to the floor of the mouth in association with lingually inclined mandibular teeth, a type of dentoalveolar compensation seen in maxillary hypoplasia associated with holoprosencephaly. Careful consideration is needed in such cases since airway management can be difficult due to postoperative swelling and oromotor dysfunctions.
Synthesis of Li<sub>2</sub>SiO<sub>3</sub> using novel water-assisted solid state reaction method
WATANABE, Mizuki,INOI, Jun,KIM, Sun Woog,KANEKO, Tatsuro,TODA, Ayano,SATO, Mineo,UEMATSU, Kazuyoshi,TODA, Kenji,KOIDE, Junko,TODA, Masako,KAWAKAMI, Emiko,KUDO, Yoshiaki,MASAKI, Takaki,YOON, Dae Ho Ceramic Society of Japan 2017 JOURNAL OF THE CERAMIC SOCIETY OF JAPAN - Vol.125 No.6
<P>Single phase of orthorhombic Li2SiO3 was synthesized via a novel soft-chemical synthesis method, water assisted solid state reaction method at 343-353K for 60 min. The crystal structure of the samples was characterized by X-ray diffraction (XRD) analysis. The scanning electron microscope (SEM) observation revealed that the estimated size of the particles is 50-200 nm. The XRD patterns and SEM images were compared to those of samples by a conventional solid state method at 1173K for 4 h. (C) 2017 The Ceramic Society of Japan. All rights reserved.</P>
Watanabe Shinichi,Iida Yuki,Hirasawa Jun,Naito Yuji,Mizutani Motoki,Uemura Akihiro,Nishimura Shogo,Suzuki Keisuke,Morita Yasunari 대한재활의학회 2023 Annals of Rehabilitation Medicine Vol.47 No.3
Objective: To investigate the effect on early mobilization in patients undergoing extra-corporeal membrane oxygenation (ECMO) and acute blood purification therapy in the intensive care unit (ICU).Methods: We conducted this multicenter retrospective cohort study by collecting data from six ICUs in Japan. Consecutive patients who were admitted to the ICU, aged ≥18 years, and received mechanical ventilation for >48 hours were eligible. The analyzed were divided into two groups: ECMO/blood purification or control group. Clinical outcomes; time to first mobilization, number of total ICU rehabilitations, mean and highest ICU mobility scale (IMS); and daily barrier changes were also investigated.Results: A total of 204 patients were included in the analysis, 43 in the ECMO/blood purification group and 161 in the control group. In comparison of clinical outcome, the ECMO/blood purification group had a significantly longer time to first mobilization: ECMO/blood purification group 6 vs. control group 4 (p=0.003), higher number of total ICU rehabilitations: 6 vs. 5 (p=0.042), lower mean: 0 vs. 1 (p=0.043) and highest IMS: 2 vs. 3 (p=0.039) during ICU stay. Circulatory factor were most frequently described as barriers to early mobilization on days 1 (51%), 2 (47%), and 3 (26%). On days 4 to 7, the most frequently described barrier was consciousness factors (21%, 16%, 19%, and 21%, respectively)Conclusion: The results of this study comparing the ECMO/blood purification group and the untreated group in the ICU showed that the ECMO/blood purification group had significantly longer days to mobilization and significantly lower mean and highest IMS.