Hitoshi Tanaka
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View article: On \(L^p \to L^q\) infinitesimal relative boundedness of Schrödinger operators \((-\Delta)^{\alpha/2}+v\)
On \(L^p \to L^q\) infinitesimal relative boundedness of Schrödinger operators \((-\Delta)^{\alpha/2}+v\) Open
By analyzing the trace inequality for Bessel potentials, some Morrey-type sufficient conditions are given for which \(L^p \to L^q\), \(1
View article: Water Hyacinth Geotextiles as a Nature-Based Solution for Riverbank Protection in the Vietnamese Mekong Delta
Water Hyacinth Geotextiles as a Nature-Based Solution for Riverbank Protection in the Vietnamese Mekong Delta Open
Riverbank erosion in the Vietnamese Mekong Delta (VMD) poses a serious threat to agricultural lands, infrastructure, and local communities. Conventional protective measures, such as synthetic geotextiles and concrete revetments, are often …
View article: Evaluating Water Level Variability Under Different Sluice Gate Operation Strategies: A Case Study of the Long Xuyen Quadrangle, Vietnam
Evaluating Water Level Variability Under Different Sluice Gate Operation Strategies: A Case Study of the Long Xuyen Quadrangle, Vietnam Open
The Vietnamese Mekong Delta (VMD) faces increasing challenges due to upstream hydrological fluctuations and climate change, necessitating optimized water management strategies. Sluice gates play a critical role in regulating water levels, …
View article: ESTIMATION OF GROWTH-INHIBITING SUBSTANCES IN TREATED EFFLUENT FROM THE GAPPEI-SYORI JOHKASOU TANDOKU-SYORI JOHKASOU AND UNTREATED GREY WATER USING ALGAL GROWTH INHIBITION TESTS
ESTIMATION OF GROWTH-INHIBITING SUBSTANCES IN TREATED EFFLUENT FROM THE GAPPEI-SYORI JOHKASOU TANDOKU-SYORI JOHKASOU AND UNTREATED GREY WATER USING ALGAL GROWTH INHIBITION TESTS Open
View article: CORRECTION TO ‘CHOQUET INTEGRALS, HAUSDORFF CONTENT AND FRACTIONAL OPERATORS’
CORRECTION TO ‘CHOQUET INTEGRALS, HAUSDORFF CONTENT AND FRACTIONAL OPERATORS’ Open
View article: Interrelationship between Wall and Beach Erosion in Loc An, Vietnam: Remote Sensing and Numerical Modeling Approaches
Interrelationship between Wall and Beach Erosion in Loc An, Vietnam: Remote Sensing and Numerical Modeling Approaches Open
Beach erosion and coastal protection are complex and interconnected phenomena that have a substantial impact on coastal environments worldwide. Among the various coastal protection measures, seawalls have been widely implemented to mitigat…
View article: Commissioning of a compact multibend achromat lattice: A new 3 GeV synchrotron radiation facility
Commissioning of a compact multibend achromat lattice: A new 3 GeV synchrotron radiation facility Open
NanoTerasu, a new 3 GeV synchrotron light source in Japan, began user operation in April 2024. It provides high-brilliance soft to tender X-rays and covers a wide spectral range from ultraviolet to tender X-rays. Its compact storage ring w…
View article: CHOQUET INTEGRALS, HAUSDORFF CONTENT AND FRACTIONAL OPERATORS
CHOQUET INTEGRALS, HAUSDORFF CONTENT AND FRACTIONAL OPERATORS Open
We show that the fractional integral operator $I_{\alpha }$ , $0<\alpha
View article: Exploring Thermal Barrier and Sedimentation Simulation for Enhanced Performance in Grati Combined Cycle Power Plant
Exploring Thermal Barrier and Sedimentation Simulation for Enhanced Performance in Grati Combined Cycle Power Plant Open
PLTGU is a power generation facility that concurrently utilizes both steam and gas power plant technologies. It necessitates a cooling system to operate efficiently throughout its entire lifespan. If PLTGU Grati plans to increase its power…
View article: Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment
Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment Open
We report the first measurement of the atmospheric neutrino-oxygen neutral-current quasielastic (NCQE) cross section in the gadolinium-loaded Super-Kamiokande (SK) water Cherenkov detector. In June 2020, SK began a new experimental phase, …
View article: Inaccessible time to visual awareness during attentional blinks in macaques and humans
Inaccessible time to visual awareness during attentional blinks in macaques and humans Open
Even when we attend to successive visual events, we often cannot notice an event occurring during a certain temporal window. Such an inaccessible time for visual awareness is known as "attentional blink" (AB). Whether AB is a phenomenon un…
View article: Choquet integrals, Hausdorff content and sparse operators
Choquet integrals, Hausdorff content and sparse operators Open
Let $H^d$, $00$. In this paper we verify that the sparse operator ${\mathcal A}_{\mathcal S}$ maps ${\mathcal L}^p(H^d)$, $1\le p<\infty$, into an associate space of Orlicz-Morrey space ${{\mathcal M}^{p'}_{Φ_0}(H^d)}'$, $Φ_0(t)=t\log(e+t)…
View article: The rectangular fractional integral operators
The rectangular fractional integral operators Open
With rectangular doubling weight, a~generalized Hardy-Littlewood-Sobolev inequality for rectangular fractional integral operators is verified. The result is a~nice application of $M$-linear embedding theorem for dyadic rectangles.
View article: Coastal Erosion Caused by River Mouth Migration on a Cuspate Delta: An Example from Thanh Hoa, Vietnam
Coastal Erosion Caused by River Mouth Migration on a Cuspate Delta: An Example from Thanh Hoa, Vietnam Open
Coastal erosion poses a significant threat to the infrastructure of the coastal community at the mouth of the Ma River in Thanh Hoa Province, Vietnam. In response, emergency solutions such as hard, protective structures are often implement…
View article: Littoral Drift Impoundment at a Sandbar Breakwater: Two Case Studies along the Bight of Benin Coast (Gulf of Guinea, West Africa)
Littoral Drift Impoundment at a Sandbar Breakwater: Two Case Studies along the Bight of Benin Coast (Gulf of Guinea, West Africa) Open
This study assessed the deposition of sediment and shoreline evolution at two newly constructed port facilities in the Bight of Benin, West Africa. Based on the Building with Nature approach, the concept of a sandbar breakwater was impleme…
View article: Choquet integrals, Hausdorff content and fractional operators
Choquet integrals, Hausdorff content and fractional operators Open
It is shown that the fractional integral operator $I_α$, $0<α
View article: Coastal Erosion Caused by River Mouth Migration on Cuspate Delta: An Example from Thanh Hoa, Vietnam
Coastal Erosion Caused by River Mouth Migration on Cuspate Delta: An Example from Thanh Hoa, Vietnam Open
Coastal erosion is threatening the infrastructures of coastal community at the Ma River mouth in Thanh Hoa province, Vietnam. When coastal erosion happens, people try to prevent it by emergency solutions like hard structures. However, this…
View article: Ultrafine and crosstalk-free 2D tactile sensor by using active-matrix thin-film transistor array
Ultrafine and crosstalk-free 2D tactile sensor by using active-matrix thin-film transistor array Open
Passive matrix (PM) technologies are widely used in various fields (e.g., manufacturing, human sensing, and robotics) to visualize the tactile pressure distribution. These technologies are powerful addressing methods with simple structures…
View article: Sand Spit Morphology at an Inlet on Phu Quoc Island, Vietnam
Sand Spit Morphology at an Inlet on Phu Quoc Island, Vietnam Open
Tidal inlets with attached sand spits are a very common coastal landform. Since the evolution of sand spits along coastlines influence the social-economic development of local coastal areas, sand spits have become the objects of numerous s…
View article: Spit Morphology at an Inlet in Phu Quoc Island, Vietnam
Spit Morphology at an Inlet in Phu Quoc Island, Vietnam Open
Tidal inlets with attached sand spits are a very common coastal morphology. Since the evolution of the sand spits along the coastline have greatly affected on the social-economic development of local coastal areas. However, previous studie…
View article: Evaluation of Cua Lo Estuary’s Morpho-Dynamic Evolution and Its Impact on Port Planning
Evaluation of Cua Lo Estuary’s Morpho-Dynamic Evolution and Its Impact on Port Planning Open
Coastal erosion and accretion along the Quang Nam coast in Vietnam have been increasing in recent years, causing negative impacts on the inhabitants and local ecology. The Cua Lo estuary in Nui Thanh district has a complex hydrodynamic reg…
View article: Analytical Eddy Viscosity Model for Turbulent Wave Boundary Layers: Application to Suspended Sediment Concentrations over Wave Ripples
Analytical Eddy Viscosity Model for Turbulent Wave Boundary Layers: Application to Suspended Sediment Concentrations over Wave Ripples Open
Turbulence related to flow oscillations near the seabed, in the wave bottom boundary layer (WBBL), is the phenomenon responsible for the suspension and transport of sediments. The vertical distribution of turbulent eddy viscosity within th…
View article: APPLICATION OF RELATIVE DAMAGE LEVEL ANALYSIS METHOD TO RUBBLE MOUND BREAKWATER COMPOSED OF SEVERAL MATERIALS IN SHALLOW WATER AREA
APPLICATION OF RELATIVE DAMAGE LEVEL ANALYSIS METHOD TO RUBBLE MOUND BREAKWATER COMPOSED OF SEVERAL MATERIALS IN SHALLOW WATER AREA Open
砕波帯内から汀線の陸側に至る浅海域に設置される,複数の材料から構成された捨石堤および傾斜堤を対象にした水理模型実験を実施して,作用波数と各構造物の被災度の変化傾向を把握した.汀線の陸側に設置される捨石堤として鉛直に多段積みしたかごマットによる土留め構造を,汀線の海側に設置される捨石堤としてバットレス型消波構造物を,砕波帯内に設置される傾斜堤として消波ブロック1層被覆式傾斜堤を対象とした.造波前後に堤体模型を写真撮影し,SfM解析により被災度を評価した.各々の材料の安定数を算…
View article: Evaluation of Algal Growth Inhibition of Effluents for Treated Water from Tandoku-syori and Gappei-syori Johkasou Using the WET Method
Evaluation of Algal Growth Inhibition of Effluents for Treated Water from Tandoku-syori and Gappei-syori Johkasou Using the WET Method Open
In Japan, the WET method for assessing the ecological effects of wastewater in a short-term chronic toxicity test employing aquatic creatures is now being explored for development. On the other hand, there is a johkasou, which is an indivi…
View article: Numerical Modeling of Seawater Intrusion in Wadi Al-Jizi Coastal Aquifer in the Sultanate of Oman
Numerical Modeling of Seawater Intrusion in Wadi Al-Jizi Coastal Aquifer in the Sultanate of Oman Open
The Sultanate of Oman is an arid country in the Arabian Peninsula suffering from insufficient freshwater supplies and extremely hot weather conditions. The only source of recharge is rainfall, which is scarce and varies with space and time…
View article: Tsunami Damping due to Bottom Friction Considering Flow Regime Transition and Depth-Limitation in a Boundary Layer
Tsunami Damping due to Bottom Friction Considering Flow Regime Transition and Depth-Limitation in a Boundary Layer Open
According to recent investigations on bottom boundary layer development under tsunami, a wave boundary can be observed even at the water depth of 10 m, rather than a steady flow type boundary layer. Moreover, it has been surprisingly repor…
View article: A Theory for Estuarine Delta Formation with Finite Beach Length under Sediment Supplied from the River
A Theory for Estuarine Delta Formation with Finite Beach Length under Sediment Supplied from the River Open
Analytical solutions for a one-line model for shoreline changes are employed to investigate the formation of two wave-dominated river delta coastlines, along with a small-scale laboratory experiment. Since the present analytical solution c…
View article: Morphology Recovery and Convergence of Topographic Evolution in the Natori River Mouth after the 2011 Tohoku Tsunami
Morphology Recovery and Convergence of Topographic Evolution in the Natori River Mouth after the 2011 Tohoku Tsunami Open
The 2011 Great East Japan earthquake and tsunami caused significant damage along the coastal region in Miyagi Prefecture. In the Natori River of Miyagi Prefecture, the recovery process of the estuarine morphology has been observed since th…
View article: Numerical Study on the Turbulent Structure of Tsunami Bottom Boundary Layer Using the 2011 Tohoku Tsunami Waveform
Numerical Study on the Turbulent Structure of Tsunami Bottom Boundary Layer Using the 2011 Tohoku Tsunami Waveform Open
In this study, the tsunami-induced bottom boundary layer was investigated based on actual waveforms obtained by the GPS buoys along the coast of the Tohoku region during the 2011 Great East Japan Earthquake tsunami. The k-ω model was utili…
View article: TSUNAMI PROPAGATION INTO RIVERS IN TOHOKU AREA DURING THE 2022 TONGA VOLCANO-TSUNAMI
TSUNAMI PROPAGATION INTO RIVERS IN TOHOKU AREA DURING THE 2022 TONGA VOLCANO-TSUNAMI Open
2022年1月にトンガ沖噴火による津波が我が国に来襲した.この際,国内各地で河川遡上津波が観測されている.そこで,河川管理者の水位計により計測された遡上津波の水位変動データを収集し,東北地区の河川を対象として河川遡上津波に及ぼす河口地形の影響について検討を行った.過去に実施された2010年チリ地震津波時の河川遡上津波に関する研究によれば,河口が閉塞気味の河川では津波波高が低いことが報告されているが,今回の津波においても同様な現象が見られた.逆に,港湾に注ぐ中小河川で河口砂州…