bluuebunny/crossref_metadata_2025 huggingface dataset:
PORT RESONANCE MITIGATION MODELED INTRODUCING ARJ-R STRUCTURES
Authors: GONZALEZ-ESCRIVA Jose A. , MEDINA Josep R. , GARRIDO Joaquin M.
Published: January 2021

ARJ-R caissons are based on the "long-circuit" concept (Medina et al, 2016) that allows the extension of the destructive wave interference mechanism to mitigate low frequency oscillations without enlarging the width of the caisson. The performance of the ARJ-R caissons is referred to its reflection coefficient (Cr) which was obtained through large-scale physical model tests (Gonzalez-Escriva et al, 2018). In this paper, the effectiveness of Anti-Reflective Jarlan-type structures for Port Resonance mitigation (ARJ-R) has been assessed numerically for the port of Denia (Spain). ARJ-R structures are constructible, with similar dimensions as conventional vertical quay caissons and with a similar cost (15percent more than conventional vertical caisson).Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/LomQEVpvjik
BULK DISSIPATION AND FLOW CHARACTERISTICS IN CUBE ARMORED BREAKWATERS
Authors: Moragues M. Victoria , Clavero Maria , Diaz-Carrasco Pilar , Losada Miguel A.
Published: January 2021

The main function of a breakwater is dissipating wave energy. The breakwater dissipates energy by means of three mechanisms: (1) wave breaking over the slope; (2) wave propagation through the secondary layers and porous core; (3) interaction with the main armor layer. A revised dimensional analysis shows that relative water depth, h/L, and wave steepness, H/L, are key factors of breakwater performance. The product of (h/L) (HI/L) (hereinafter named as , alternate slope similarity parameter) can be applied to quantify the reflected and transmitted energy coefficients and the dissipation rate (Daz-Carrasco et al., 2020) and to identify the type of wave breaking and the domains of wave energy transformation (Moragues et al., 2020). The aim of this work is to analyze the dissipation term and its relation with the alternate slope similarity parameter , as well as correlate the flow characteristics (run-up, rundown) with the type of wave breaking and the bulk dissipation. For that purpose, former data (Clavero et al. 2020) and data from new tests have been analyzed. Whereas it is not clear that the use of different experimental techniques will give the same results in the laboratory, three different techniques for sea states selection have been taken into account in the new tests: (1) keeping constant h/L; (2) keeping constant H/L or Ir; and (3) varying h/L and H/L.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/oMZ05U0igCs
NONLINEAR METHOD FOR REAL-TIME WAVE FORCE RECONSTRUCTION ON A CYLINDER BY USING MEASURED WAVE ELEVATION
Authors: Liu Jiabin , Guo Anxin
Published: January 2021

For a constructed offshore structure, wave force evaluation on its foundation in an intricate wave field will benefit the load data collection and structural safety monitoring. Then, the collected data can provide valuable references for similar structures constructed in the same ocean region in the future. A real-time wave force prediction can further contribute to the active control of the structural dynamic responses. According to the incident waves known or unknown, the wave force reconstruction issue can be divided into two categories. When the incident waves are known, the wave forces on the cylinder can be achieved by the theoretical methods or numerical methods. When the incident waves are unknown, researchers try to reconstruct the wave force indirectly. For a small-scale cylinder, researchers predicted the wave forces by using the Morison equation in random wave fields with measured data of wave elevation. These studies indicated a shortcut for determining the wave force on the cylinder by using the data of water surface elevation. However, the wave fields are assumed to be undisturbed by the structure in the mentioned studies. For a vertical larger-scale cylinder, Liu et al. (2018) established a prediction method to reconstruct wave force by using the recorded data of wave elevation around the cylinder. A linear method for the circular cylinder is provided that shows an excellent reconstruction of wave force for its dominant frequent components. However, reconstruction results showed that high frequency wave forces are underestimated and low frequency wave forces are overestimated, which means the linear method is incapable to predict the nonlinear wave forces on the structure. An improved method is built for reconstructing wave forces on a circular cylinder in the real-time. Two different algorithms, Fast Fourier Translation (FFT) and Recursive Least Squares (RLS), for real-time reconstruction are conducted. The present method can be applied for the data collection of wave loads on a constructed offshore structure.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/PYOuCNP8pgQ
AN EXPERIMENTAL STUDY OF A SOLITARY WAVE IMPACTING A VERTICAL SLENDER CYLINDER
Authors: Tai Bing , Ma Yuxiang , Dong Guohai , Perlin Marc
Published: January 2021

Solitary waves can evolve into plunging breakers during shoaling, inducing high wave loads on coastal structures. Meanwhile, plunging waves propagate with rapid spatial-temporal variations both in wave geometry and wave kinematics, causing varying forces on structures for different breaking stages (Chan et al., 1995). Although there have been numerous experiments for wave forces on cylinders, to our knowledge no experiments have studied the forces at different breaking stages of a plunging solitary wave. Thus, in our study, experiments are conducted to investigate the force due to a plunging solitary wave impacting a circular cylinder as a function of the wave's phase. Due to these forces, as expected structural responses are induced (Paulsen et al., 2019); to eliminate the effect of the structural response, the equation of motion is proposed to facilitate extracting only the isolated hydrodynamic forces.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/P07Cdlnxe7s
ANALYSIS OF A SCHOOL BUILDING AGAINST TYPHOON HAIYAN STORM SURGE FORCES
Authors: Valdez Justin Joseph , Shibayama Tomoya
Published: January 2021

In 2013 Typhoon Haiyan dealt strong winds and storm surges to Tacloban City, Philippines. After that, the standard public school buildings were designed using the load provisions of the updated 2015 National Structural Code of the Philippines. However, it is important to analyze if the school buildings can resist failure against another Haiyan storm surge event. Haiyan was simulated using the the Weather Research and Forecasting (WRF) Model, and the storm surge was simulated using the Finite Volume Community Ocean Model (FVCOM). The wind and flood loads were then calculated and applied on a two-story school building model in STAAD.Pro, and the maximum shear forces and bending moments in the 300 beams and columns were compared to its capacity.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/P3E1_aizbnE
EFFECT OF TRANSLATE SPEED OF TYPHOONS ON WIND WAVES
Authors: Inagaki Naoto , Shibayama Tomoya , Esteban Miguel , Takabatake Tomoyuki
Published: January 2021

Quantitative assessments of the effect that changes in the translate speed of typhoons have on wind waves were carried out. A WRF-SWAN coupled model that used observed meteorological data was applied to eight different typhoons in the vicinity of Shiono-Misaki, Japan. The authors proposed a new methodology to modify the translate speed and wind field of tropical cyclones, using an empirical model in which the gross wind field is expressed as the summation of two different types of wind generation (due to either the pressure gradient or translation speed). As a result, it is important to raise awareness of the future problems that can be caused by large storms that stall for prolonged periods of time.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/oCSbyaYoNEc
SHIP PROPELLER EFFECTS ON HARBOURS
Authors: Llull Toni , Mujal-Colilles Anna , Castells Marcella , Gironella Xavier
Published: January 2021

The increase in marine traffic during the last decades has led to important changes in ship designs. These changes have been directly affecting harbor structures designed to host smaller and less powerful ships. One of the most important consequences is the erosion of the seafloor close to the toes of the docking infrastructures which affects their stability. The World Association for Waterborne Transport Infrastructures published a guideline resuming the most used equations to solve the scouring problem (PIANC 2015). However most of the proposed formulas are empirical based using single propellers. Other common propulsion systems, such as the twin propeller, have been barely studied so far. Moreover, the propeller scouring action by a free developing jet has received much more attention in comparison with confined scour studies, i.e. nearby marine structures. Indeed, only one reference (Mujal-Colilles et al. 2018) with experiments on the effects of twin propeller in a confined scenario is found nowadays, although it is known that most of the ro-ro and ferry ships use this propulsion system when maneuvering near closed quays. This contribution aims to provide new insights about the effects that twin propeller propulsion system has over the seabed through a set of experiments with mobile sand bed. The effects of the propeller pitch ratio are also evaluated in an attempt to better reproduce the behaviour of ferry ships, since most of them use a Controllable Pitch Propeller (CPP) system.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/zx7-kKUZ7HU
SIMULATING BREAKING WAVES WITH THE REYNOLDS STRESS TURBULENCE MODEL
Authors: Li Yuzhu , Fredberg Martin Bechmann , Larsen Bjarke Eltard , Fuhrman David R.
Published: January 2021

The present study formally proved that Reynolds stress models (RSMs) are unconditionally stable in the potential flow regions. RSMs resolve all components of the Reynolds stress, eliminating e.g. the assumed isotropy of turbulence inherent within two-equation models. The present study implemented and applied Wilcox stress-omega turbulence model for simulating breaking waves. It shows that the Wilcox stress-omega turbulence model can predict accurate results from pre-breaking all the way into the inner surf zone, especially for the undertow velocity profiles in the inner surf zone, which even stabilized two-equation models fails to accurately predict.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/hZqqlGbHpkA
DEFECT FUNCTION MODELS FOR THE WAVE BOUNDARY LAYERS
Authors: Teng Yunfei , Lu Lin , Tong Liang Cheng, Feifei , Tang Guoqiang
Published: January 2021

The boundary layer flow induced by surface waves has been extensively investigated due to its significance in engineering applications such as sediment transport and hydrodynamic forces on subsea structures. Several forms of defect functions (referred to as DF hereafter) were developed in the past decades, e.g. Sleath (1970, 1982), Nielsen (1985, 2016) and etc., due to their good efficiency in the description of the velocity distribution in one dimensional wave boundary layer (WBL). In this work, two forms of DFs are proposed: (i) DF-I describes the velocity distributions and bottom shear stresses in phase space with 4 model parameters; (ii) DF-II describes the maximum WBL profile with 3 model parameters. A number of datasets to support the validation of the DFs were obtained through experimental and numerical tests. Two sets of experiments were conducted individually in a free-surface-wave flume located in Dalian University of Technology and an oscillating-flow flume located in the University of Western Australia. For the free surface wave tests, the velocity was measured.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/RK-z0Q8rTjk
TRANSITIONAL IMPACTS OF ENSO ON WAVE CLIMATE IN COASTAL REGIONS
Authors: Oderiz Itxaso , Mori Nobuhito , Mortlock Thomas , Mendoza Edgar , Silva Rodolfo
Published: January 2021

Amongst all the factors involved in coastal risk assessment, climate variability is key, due to its potential for modifying the coast, particularly through increased seasonal risk of erosion-flooding on the coast (Toimil et al. 2020; Wahl and Plant 2015). The principal driver of interannual variability of the wave climate around the world is El Nio-Southern Oscillation (ENSO). Many researches have focused on the analysis of this phenomenon globally ( Stopa and Cheung 2014), its impacts on regional wave climate (Barnard et al. 2015, 2017; Oderiz et al. 2020; Reguero, Mendez, and Losada 2013) and their local coastal effects ( Mortlock and Goodwin 2016). This interest in ENSO impacts in wave climate is motivated by its capacity to cause coastal erosion (Barnard et al. 2015). Particularly, the temporal and spatial transition of ENSO is nowadays a current issue (Ha et al. 2012). On the worlds coasts, the ENSO impacts delay is not yet fully understood, nor integrated into engineering practices.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/DZbOYztPYW0
ENSEMBLE WAVE CLIMATE PROJECTIONS BASED ON CMIP5 MODELS
Authors: Mori Nobuhito , Morim Joao , Hemer Mark , Wang Xiaolan L. , Project COWCLIP
Published: January 2021

A warming climate has the potential to not only raise sea level but also exacerbate coastal hazards due to changes in storm frequency and intensity. Along open coasts where wave energy is often the dominant process dictating shoreline positions, changes in mean and extreme wave conditions are likely to alter long-term geomorphic evolution patterns. The Coordinated Ocean Wave Climate Project (COWCLIP) is to provide infrastructure to support a systematic, community-based framework that allows for validation and inter-comparison of wave projections. Here, the primary aims are to 1) present quantitative evaluations of projected global scale wave conditions and 2) to present the framework and preliminary results of regional wave modeling that will provide projections of nearshore wave conditions for use in long-term geomorphic change analyzes.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/Y6BEHq5wZXw
HIGH ORDER NONLINEAR WAVE INTERACTIONS FROM DEEP TO FINITE WATER DEPTH WITH BOTTOM TOPOGRAPHY CHANGE
Authors: Lyu Zuorui , Kashima Hiroaki , Mori Nobuhito
Published: January 2021

In recent years, freak wave/rouge wave has become an important problem in science and engineering. Modulational instability is considered to be an important factor leading to freak wave in the wave evolution of deep water, and Janssen (2003) defined Benjamin-Feir index (BFI) to reflect it. Mori and Janssen (2006) gave the occurrence probability of freak waves based on a weakly non-Gaussian theory, and distribution of wave height is determined by skewness and kurtosis of surface elevation to a considerable extent in deep water. According to observational record, freak wave has not only been found in deep water in the ocean, but also been observed in shallow water and coastal areas. In the process of water wave entering continental shelf, water depth is changing with mild slope after a long distance propagation. This study focus on investigating how water depth affect skewness and kurtosis in the high order nonlinear wave evolution from deep water to finite water depth in two-dimension.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/a8LiJvXWRrw
POST-BOUSSINESQ MODEL FOR NONLINEAR IRREGULAR WAVE PROPAGATION IN PORTS AND WAVE-STRUCTURE INTERACTION
Authors: Karambas Theofanis , Makris Christos , Baltikas Vasilis
Published: January 2021

In this work, an updated version of the Karambas and Memos (2009) Boussinesq model for weakly nonlinear fully dispersive water waves, is introduced. It is implemented for wave propagation and transformation (due to shoaling, refraction, diffraction, bottom friction, wave breaking, runup, wave-structure interaction etc.) in nearshore zones and inside ports. One of the main goals is the model's thorough validation, thus it is tested against experimental data of wave transmission over and through breakwaters, uni- and multi-directional spectral wave transformation over complex bathymetries and diffraction through a breakwater gap. Case studies of model application over realistic variable bathymetries at characteristic Greek ports are also presented.
Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/w8-AfAW6EYM
BREAKING AND WASH UP OF SOLITARY WAVES ON A COMPOSITE BEACH
Authors: Hafen Hajo von , Stolle Jacob , Goseberg Nils , Nistor Ioan
Published: January 2021

Hazardous events, such as landslides, rock slides, rock falls or avalanches often generate extreme, impulsive waves when entering water bodies (Fuchs & Hager, 2015). These waves are approximated by solitary waves and researchers investigate their damage potential when inundating built environment. Deepening the understanding of solitary waves running up a uniform beach slope and propagating over a subsequent horizontal plane can help to reduce and mitigate damage and the number of casualties caused by such a hazardous event. So far, few authors addressed this specific setting near-shore (Fuchs & Hager, 2015; Zelt & Raichlen, 1991). In this study, large scale solitary waves propagate about 200 m in in the Large-Wave Flume (GWK, 307 m 5 m 7 m) at the Coastal Research Center in Hannover, Germany then they run up a beach slope and subsequently break, generating a bore which advances onto a subsequent, initially dry, horizontal surface. Unlike previous studies, the generated solitary waves broke close to the edge between the beach slope and the horizontal plane section. The overall aim of this study is to investigate the characteristics of the broken waves' dynamics. In addition, their surge profile and front celerity are compared to those of the non-breaking solitary waves. Subsequently, the differences between the velocity regimes along the bore propagation path are presented and linked to the fundamental physical processes behind.
WAVE EFFECTS ON STORM SURGE IN A SMALL TWO-INLET BAY
Authors: M.Orescanin Mara , Massey Thomas Chris , Reffitt Matt , Raubenheimer Britt , Elgar Steve
Published: January 2021

Storm surge resulting from oceanic extreme events, commonly tropical cyclones, is a major contributor to coastal flooding and property damage. Thus, there is significant investment in accurate predictions. However, forecasts of storm surge often are focused on regional scales, and are unable to resolve complex nearshore bathymetry and small tidal inlets (Yin et al. 2016) that can be critical to local surge magnitudes and timing. Here, model simulations with a regional wave-flow coupled model (NACCS), a high bathymetric resolution uncoupled flow model (ADCIRC), and a high resolution coupled model (CSTORM) are compared with observations of storm surge during Hurricane Irene (Atlantic Storm 09, 2011) within Katama Bay, Martha's Vineyard, Massachusetts.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/hKdA2zYWI2Y
DEVELOPMENT OF A DEEP-LEARNING BASED WAVE FORECASTING MODEL USING LSTM NETWORK
Authors: Kyaw Thit Oo , Shibayama Tomoya , Shibutani Yoko , Kotake Yasuo
Published: January 2021

Forecasting of wave conditions plays an essential role for offshore construction and maintenance. Recently, machine learning-based wave forecasting models have been developed and their integrated usage with physics-based numerical models has become popular. These studies mostly apply Feed Forward Neural Networks (FFNNs) with an emphasis on prediction of time-series of waves, tides and storm surges. As a particularly different approach, we develop a deep learning-based wave forecasting model using Long Short-Term Memory (LSTM) network under Recurrent Neural Networks. As a case study, the model will be utilized to predict the wave conditions (low or high) near the Tottori Port, Japan.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/oMvIS9zkIOs
EVALUATION AND BIAS CORRECTION OF MARINE SURFACE WINDS IN THE WESTERN NORTH PACIFIC FROM CMIP5 AND CMIP6 GCMS FOR WAVE CLIMATE MODELLING
Authors: Badriana Mochamad Riam , Lee Han Soo
Published: January 2021

For over years, fundamental component and dataset in climate projection had been covered by general circulation models (GCMs) output mainly from the Coupled Model Inter-comparison Project (CMIP). Marine surface winds are an important output of GCMs and they provide input to marine forecasts and warning systems. Their accuracy have direct implications for marine safety, air-sea fluxes, and wave and ocean modellings. Western North Pacific (WNP) is known as a highly vulnerable region to oceanic and atmospheric hazards, such as storm surges, waves and typhoons. Therefore, this study aims to examine the quality of marine surface winds from CMIP5 and CMIP6 GCMs in the WNP and its sub-regions with respect to a reference data, and presents bias correction of marine surface winds for contributing to wave and ocean modelling communities.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/750mqrERbS8
DETERMINISTIC SEA WAVES PREDICTION FROM X-BAND RADAR: NEW ALGORITHM AND SEA TRIAL
Authors: Al-Ani Mustafa , Belmont Michael , Christmas Jacqueline , Paolo Anthony De
Published: January 2021

Many maritime operations can benefit from short-term deterministic sea wave prediction (DSWP). Conventional X-band radars constitute a convenient cheap source of measurements for DSWP. The radar backscatter measurements suffer from several imperfections such as the effect of larger waves shadowing smaller waves. In order to extract the wave profiles and build a reliable sea prediction model, multiple radar scans must be processed. In this paper, we present a new single-wavenumber least-squares spectral algorithm for wave prediction from radar backscatter. The proposed technique is evaluated using field data from a dedicated sea trial.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/g0ejshY_nhc
ADVANCES IN THE UNSTRUCTURED WAVEWATCH III AND APPLICATION TO HURRICANE DORIAN
Authors: Smith Jane McKee , Hesser Tyler , Bryant Mary Anderson , Roland Aron , Cox Andrew
Published: January 2021

The spectral wave generation and propagation model WAVEWATCH III (WW3) is undergoing rapid development to extend capability and applicability. An option for unstructured grids and implicit solution provides WW3 with the flexibility and efficiency to resolve complex shorelines and high-gradient wave zones to drive nearshore circulation, wave setup, and wave-driven sediment transport with multi-scale spatial coverage over approximately three orders of magnitude. The model is compatible with community-based coupling infrastructure to facilitate two-way coupling with circulation models for simulating hurricane storm surge and waves. Unstructured WW3 is applied for 2019 Hurricane Dorian and validated with National Data Buoy Center buoys and nearshore gauges at the US Army Corps of Engineers Field Research Facility.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/kz9G46xUD0k
STEREO IMAGE ANALYSIS OF AERIAL IMAGES FROM TWO UAVS FOR WAVE MONITORING IN SURF ZONE
Authors: Mitobe Yuta
Published: January 2021

UAVs have been considered as one of the most powerful tools for coastal monitoring. 3D Topography of sandy beaches can be obtained with automatic flight of single UAV and 3D shape reconstruction technique. Furthermore, UAVs have been utilized for wave monitoring (Holman et al., 2017) as the video images or a series of still images from aerial cameras enable us to observe wave propagations from higher viewpoints. Although there are some proposed techniques to extract wave celerity and direction from the aerial images by UAV, there doesn't seem to be enough trials to obtain wave height, which is one of the most important parameters to consider coastal problems such as beach morphological changes. In this study, stereo image analysis for 3D shape reconstruction was applied to stereo image pairs by two UAVs as a test of the applicability of the existing stereo measurement technique and also possibility of 3D wave deformation measurement in field.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/QZBAwj5RIi4
NEW BREAKER INDEX FORMULA IN PARAMETRIC WAVE MODEL
Authors: Zhang Chi , Li Yuan , Cai Yu , Shi Jian , Zheng Jinhai
Published: January 2021

Phase-averaged parametric wave models have been widely used to predict nearshore wave height transformation. The performance of parametric models depends significantly on the wave breaker index (), which controls the amount of breaking energy dissipation. Previous parameterizations improved the model predictability by considering the breaker index as a tunable coefficient, while made less effort to the physical interpretation for the proposed formulas. Indeed, inconsistency from the physical perspectives might exist. Therefore, the parameterization of still requires further investigation by considering the comprehensive influences of the offshore wave parameters and the local water depth, as well as the possible relationships with the breaker type and the surf zone state.
WAVE-DRIVEN COASTAL DYNAMICS: CAN WE RELY ON PHASE-RESOLVING MODELS?
Authors: Azouri Assaf , Roeber Volker , Guiles Martin David , Iwamoto Melissa , Owens Tara , Becker Janet , Luther Douglas S
Published: January 2021

Wave simulations from two Boussinesq-type models: BOSZ (Roeber & Cheung, 2012) and FUNWAVE (Shi et al., 2012), and a non-hydrostatic model: XBeach (Roelvink et al., 2009), are compared to observational data in a harbor and along the exposed coast of northwest O'ahu Island, Hawai'i, under highly energetic sea/swell forcing conditions. In the present comparison we attempt to address whether the models can (i) reproduce the observed spectra at different locations over a fringing reef and inside a harbor, and; (ii) draw a consistent 2-dimensional picture of the gravity and IG wave fields throughout the computational domain.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/kbbOT0ZpnEo
MULTI-SCALE INFRA-GRAVITY WAVE DYNAMICS - THE FRENCH BASQUE COAST
Authors: Roeber Volker , Nestler J. Dylan , Pinault Jonas , Azouri Assaf , Bellafont Florian
Published: January 2021

Phase-resolving numerical models are a powerful tool to identify and analyze dominant wave processes along a site of interest. We have carried out a numerical study related to infra-gravity wave dynamics along the French Basque coast. The computed scenarios are representative for the swell conditions at the site of interest and include variations in offshore wave height, direction, and water level. Several statistical methods were employed that illustrate that the irregular bathymetry is a key component for the strong variations in sea-swell and IG-wave energy. The water level is demonstrated to substantially affect the IG-wave behavior, more than the wave direction. Swash oscillations in the IG-frequency band are greater than or equal to sea-swell swash oscillations at nearly all locations along the studied shoreline.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/ELZwJCokkX0
AN EFFICIENT AND ROBUST GPGPU-BASED SHALLOW WATER MODEL
Authors: Mihami Fatima-zahra , Roeber Volker
Published: January 2021

We present an efficient and robust numerical model for the solution of the Shallow Water Equations with the objective to develop the numerical foundation for an advanced free surface flow solver. The numerical solution is based on an explicit Finite Volume scheme on a staggered grid to ensure the conservation of mass and momentum across flow discontinuities and wet-dry transitions. This leads to an accurate numerical solution at low computational cost without the need for Riemann solvers. The efficiency of the lean numerical structure is further optimized through a CUDA-GPU implementation.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/xMnK_r7Tj1Q
ROGUE WAVE ASYMMETRY IN THE DIRECT NUMERICAL SIMULATIONS OF DIRECTIONAL JONSWAP WAVES
Authors: Slunyaev Alexey , Kokorina Anna
Published: January 2021

The asymmetry between the troughs from the rear and front sides of rogue waves is the particular object of the present study. In our previous simulations of unidirectional waves the typical picture of a rogue waves possesses the trend that most of the rogue waves where characterized by deeper rear troughs. In the present work we broaden the discussion of the rogue wave front-to-crest asymmetry to the directional case. The direct numerical simulation of primitive water equations is an affordable alternative to the in-situ or laboratory measurements, in particularly when the interest is focused on the long-term evolution or on the detailed consideration of the water wave movement in space and time. In this work we simulate irregular surface waves in the hydrodynamic equations using the High-Order Spectral Method, and focus on the so-called rogue waves.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/plseXdjpE6c
ASSESSMENT OF LONG-TERM WIND AND WAVE TRENDS IN THE BLACK SEA
Authors: Islek Fulya , Yuksel Yalcin , Sahin Cihan
Published: January 2021

The wind and wave climate over the Black Sea were investigated by providing extensive datasets covering the last 40 years (1979-2018). Wind characteristics over the Black Sea were evaluated by using two well-known wind fields (i.e., ECMWF ERA-Interim and NCEP/CFSR). Wave simulations were generated from the MIKE 21 SW model forcing with two wind datasets. The possible effect of the long-term variability on the wind and wave characteristics over the Black Sea was discussed in the context of climate change.
NEW DEVELOPMENTS FOR CFD HYBRID MODELING FOR NUMERICAL WAVE TANKS
Authors: Lara Javier , Paolo Benedetto Di , Barajas Gabriel , Maza Maria , Garcia-Maribona Julio , Losada Inigo J.
Published: January 2021

The use of CFD for numerical representation of laboratory wave flume and basins, commonly known as numerical wave tanks (NWT), has become more popular in recent years with the aim of improving knowledge in the field of wave-structure interaction (WSI), both fixed and floating, due to advances that have been made in numerical modelling, mainly with the reproduction of three dimensional problems. The use of this technique is displacing even traditional approaches based on the use of potential flow equations, due to the versatility provided by the CFD approach, which allows considering nonlinear interactions between structures and waves, and above all, extreme events such as wave breaking. However, implementation of these models as a complementary tool to physical modeling facilities is not yet standardized and requires further development to hybridize these two techniques, numerical and experimental, in order to obtain a better knowledge of physical processes. Implementation still requires overcoming existing modeling limitations and the additional steps to be taken focus on the following areas are: a) numerically mirror wave generation and active/passive absorption in physical installations; b) numerical resolution of WSI problems, which to date depends on each WSI case; c) computational cost, which may be the bottleneck for NWT implementation; and, finally, the most important feature that is where the added value of the hybrid approach lies, d) the exchange of information between the laboratory measurements and the results of the numerical simulations in order to obtain a better understanding of WSI problems. This paper will present an analysis of the main aspects described above for the implementation of hybrid techniques for the study of WSI problems (floating and fixed). The latest advances in modeling developed with IHFOAM solver (ihfoam.ihcantabria.com), and physical modeling procedures to link laboratory and numerical tools will be presented. The main objective is establishing a standard procedure to implement this technique in any physical installation.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/6mAQccSrREM
VELOCITY CHARACTERISTICS IN WAKE OF A NON-SPHERE BODY AND IN PORE OF POROUS MEDIA COMPOSED OF NON-SPHERES
Authors: Yamamura Yuji , Shigematsu Takaaki , Nakajo Sota
Published: January 2021

Details of a velocity field around a prolate spheroid in a steady flow with different angles of attack were investigated by carrying out a hydraulic experiment using the PTV technique. It was found that characteristics of the vortex in the wake of the prolate spheroid were different depending on the angle of attack. It was clearly found that the velocity field changes significantly in the wake. That is to say that there were some areas with strong and weak turbulence and that also some areas with a certain periodic and unclear periodic velocity change with significant change. It was clear that these characteristics depend on the angle of attack of the spheroid. Further, it was confirmed that the distribution of the turbulence intensity was different between the horizontal and vertical components.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/34Dw1CSLEz4
RAPID DEPLOYMENT AND POST-STORM RECONNAISSANCE OF HURRICANE LAURA
Authors: Jafari Navid H. , Chen Qin , Cadigan Jack
Published: January 2021

Hurricane Laura made landfall on the southwest Louisiana coast near Cameron, LA on August 26th. As Laura approached the Louisiana coast, the Coastal Emergency Risks Assessment predicted a storm surge of approximately 5.2 m (17 ft), which marked the strongest surge to impact southwest Louisiana since the catastrophic Hurricane Rita in 2005. As a result, a team led by LSU and NEU mobilized to deploy surge and wave sensors and collect drone imagery at Rockefeller Wildlife Refuge and Cameron, LA on August 25th before the arrival of tropical storm winds. Rockefeller Refuge was selected to measure the capacity of wetlands and breakwaters to attenuate hurricane surge and waves, and pressure sensors were strategically placed at locations of civil infrastructure at Cameron to capture hurricane-induced overland flow (see Fig. 1). After the surge water receded, LSU retrieved the sensors, collected RTK elevation transects and multispectral drone imagery, and surveyed infrastructure damage along the southwest corridor of Louisiana, following the Highway 82 from Abbeville to Cameron.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/IevnFZ2YVfI
EVOLUTION OF UNSTABLE WAVE PACKETS OVER VARIABLE BATHYMETRY
Authors: Kimmoun Olivier , Hsu H.C , Chabchoub Amin
Published: January 2021

Several field observations have reported the formation of rogue waves in coastal zones, see Chien et al. (2002) for an example in Taiwanese sea. The mechanisms that lead to the occurrence of rogue waves in finite water depth to shallow water are not well understood yet under the conjecture of modulation instability. Indeed, this theory for uni-directional waves shows that when kh is lower than a threshold of 1.363 in homogeneous water depth conditions, the wave train becomes stable to side-band perturbations. Then if the wave train is stable, the appearance of rogue waves is not possible within this linear stability framework. One explanation may come from the complex wave transformation mechanisms in variable bathymetry, especially, for cases of steep slopes or near the edge between a steep slope and a gentle slope as it is the case of the continental shelf. Very few laboratory experiments have been so far addressing the influence of the bathymetry on extreme wave occurrence (Baldock and Swan (1996), Kashima et al. (2012), Ma et al. (2015)).Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/a5M4PS-Lo4Q
Methanocorpusculaceae
Authors: Shao Nana , Akinyemi Taiwo S. , Whitman William B.
Published: January 2021

Me.tha.no.cor.pus.cu.la.ce'ae. N.L. neut. n.
Methanocorpusculum
type genus of the family; ‐
aceae
ending to denote a family; N.L. fem. pl. n.
Methanocorpusculaceae
the family of
Methanocorpusculum
.

Halobacteriota / Methanomicrobia / Methanomicrobiales / Methanocorpusculaceae

Small, irregular cocci, <2 μm in diameter. Endospores not formed. Stain Gram‐negative. Lysed by detergent or hypotonic shock. Nonmotile or very weakly motile. Strictly anaerobic. Optimal growth temperature is 30–37°C; optimal pH is near 7.0. NaCl is not required for growth. Energy production by reduction of CO
2
to CH
4
, with H
2
, formate, and sometimes secondary alcohols as electron donors; acetate, methylamines, or methanol are not catabolized. Acetate and either yeast extract, peptones, or rumen fluid are required as carbon and nitrogen sources. Sulfide serves as a sulfur source. Occur in sewage sludge digesters, anaerobic wastewater treatment plants, and anaerobic reactors. Currently, one genus is described.

DNA G + C content (mol%)
: 49.8–52.4 (Genome).

Type genus
:
Methanocorpusculum
Zellner et al. 1987, VL24.
Desulfohalotomaculaceae
fam. nov.
Authors: Watanabe Miho , Fukui Manabu , Kuever Jan
Published: January 2021

N.L. neut. n.
Desulfohalotomaculum
type genus of the family; suff.
‐aceae
ending to denote a family; N.L. masc. pl. n.
Desulfohalotomaculaceae
the family of
Desulfohalotomaculum
.

Desulfotomaculota (Firmicutes_B) / Desulfotomaculia / Desulfotomaculales /
Desulfohalotomaculaceae
fam. nov.

Cells are straight or slightly curved rods to vibroids. Type species of the type genus stains Gram‐negative. Cells of the genera
Desulfofalx
,
Desulfovectis
, and
Desulforadius
stain Gram‐positive. Oval spores occur central, subterminal, or terminal of cells. Nonmotile or motile by means of flagella. Strictly anaerobic, having a respiratory type of metabolism. Thermophilic or mesophilic. Alkaliphilic or neutrophilic. NaCl is essential for growth. The type species of the type genus is halophilic. Chemoorganoheterotrophic growth occurs using organic acids and alcohols. Chemolithoautotrophic growth with H
2
and CO
2
is observed in species of two genera. Substrates are incompletely oxidized. Sulfate, sulfite, and thiosulfate serve as electron acceptors and are reduced to H
2
S. Pyruvate fermentation is observed in some species. Desulfoviridin is absent. The major cellular fatty acids are C
16:0
, C
18:0
, iso‐C
15:0
, iso‐C
17:1
, I/anteiso‐C
17:1
B, C
16:1
, C
18:1
δ1, and C
18:1
ω7
c
. The family currently accommodates four genera,
Desulfohalotomaculum, Desulfofalx, Desulfovectis,
and
Desulforadius
. The type genus is
Desulfohalotomaculum
. The type strain of the type species of the genus
Desulfohalotomaculum
was isolated from a mixture of ground water and oil from an oil‐producing well containing 70 g/l of total salinity.

DNA G + C content (mol%)
:
44.4–56.3 (LC); 44.2 (genome).

Type genus
:
Desulfohalotomaculum
Watanabe et al. 2018
VP
.
Frederiksenia
Authors: Kuhnert Peter , Christensen Henrik , Bisgaard Magne , Korczak Bożena M.
Published: January 2021

Fre.de.rik.sen'i.a. N.L. fem. n.
Frederiksenia
named in tribute to Wilhelm C. Frederiksen, a Danish microbiologist, for his contribution to research on
Pasteurellaceae
.

Proteobacteria / Gammaproteobacteria / Pasteurellales / Pasteurellaceae / Frederiksenia

The description of
Frederiksenia
is based on the characterization of 24 strains from five European countries and were mainly isolated from dogs and human dog‐bite wounds. The strains were previously classified as Bisgaard taxon 16 and formed a phenotypically and genetically homogenous group within the family
Pasteurellaceae
. The genus is phenotypically similar to
Pasteurella
, but phylogenetically forms a clearly separated monophyletic branch based on 16S rRNA,
rpoB
,
infB
, and
recN
gene sequences.
Frederiksenia
showed closest genetic relationship with
Bibersteinia trehalosi
. Predicted genome similarity values based on the
recN
gene sequences between taxon 16 isolates and the type strains of type species of known genera of
Pasteurellaceae
were below the genus level. Furthermore, MALDI‐TOF clearly separated it from all other genera of
Pasteurellaceae
, showing a characteristic peak combination. The genus is currently formed by a single species
Frederiksenia canicola
. Major whole‐cell fatty acids for the type strain of this species are C
14:0
, C
16:0
, C
18:0
, and C
16:1
ω7
c
/C
15:0
iso 2OH. Major respiratory quinones are menaquinone‐8, ubiquinone‐8, and demethylmenaquinone‐8.

DNA G + C content (mol%)
: 42.6 by genome analysis of the type strain DSM 25797
T
.

Type species
:
Frederiksenia canicola
Korczak et al. 2014, VL158.
“
Psychrodesulfovibrio
” gen. nov.
Authors: Galushko Alexander , Kuever Jan
Published: January 2021

Psy.chro.de.sul.fo.vi'bri.o. Gr. masc. adj.
psychros,
cold; N.L. masc. n.
Desulfovibrio,
a bacterial genus; N.L. masc. n.
Psychrodesulfovibrio
, a
Desulfovibrio
living in the cold.

Desulfobacterota / Desulfovibrionia / Desulfovibrionales / Desulfovibrionaceae /
Psychrodesulfovibrio
gen. nov.

Cells are vibrio‐shaped, 0.3–0.8 × 0.5–2.0 μm. Occur singly or in pairs. Spore formation is not observed. Stain Gram‐negative. Cells are motile by a single polar flagellum. Strictly anaerobic, having respiratory and fermentative types of metabolism. Chemoorganoheterotrophic. Lactate, pyruvate, succinate, malate, ethanol, and butanol serve as electron donors and carbon sources and are incompletely oxidized to acetate. Formate can serve as an electron donor in the presence of acetate as an organic carbon source. H
2
plus CO
2
is not used. Sulfate serves as a terminal electron acceptor and is reduced to H
2
S. Desulfoviridin is present. Fermentative growth on pyruvate and malate. Mesophilic, the optimum temperature for growth is 28–30°C. Slightly alkaliphilic and aerotolerant. Media containing a reductant and
p
‐aminobenzoate are required for growth. Occur in freshwater, brackish water, and habitats with marine NaCl concentrations such as oil fields.

DNA G + C content (mol%)
: 49.3 (LC).

Type species
:
“
Psychrodesulfovibrio psychrotolerans
”
comb. nov. (basonym:
Desulfovibrio psychrotolerans
Sasi Jyothsna et al., 2008
VP
).
Cavicella
Authors: Albuquerque Luciana , Egas Conceição
Published: January 2021

Ca.vi.cel'la. L. neut. n.
cavum
a cave (hole); L. fem. n.
cella
a small room, a cell; N.L. fem. n.
Cavicella
a cell from a cave (hole).

Proteobacteria / Gammaproteobacteria / Pseudomonadales / Moraxellaceae / Cavicella

The genus
Cavicella
comprises one species named
Cavicella subterranea
. The organism forms rod‐shaped cells that are 0.5 μm in width and 2.5–3.0 μm in length. The species is nonmotile. Cells stain Gram‐negative and endospores are not observed. Colonies are nonpigmented. The species
C. subterranea
is mesophilic and strictly aerobic. Possess cytochrome
c
oxidase and is catalase positive. Chemoorganotrophic. Growth factors are necessary for growth in minimal defined medium. Acetate and pyruvate are used as carbon and energy sources; sugars, amino acids, and polyols tested are not used for growth. Major respiratory quinone of this species is ubiquinone 12 (U‐12). The polar lipid profile is composed of diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), and one unidentified phospholipid (PL). Fatty acids are primarily straight‐chain saturated and monounsaturated; hydroxy fatty acids are also present. The type strain was isolated from a deep aquifer.

DNA G + C content (mol%)
: 62.0 (HPLC).

Type species
:
Cavicella subterranea
França et al. 2015a
VP
.
Fimbriiglobus
Authors: Dedysh Svetlana N.
Published: January 2021

Fim.bri.i. glo'bus. L. fem. pl. n.
fimbriae
fibres, threads, fringe, and in biology, fimbriae; L. masc. n.
globus
ball; N.L. masc. n.
Fimbriiglobus
, fimbriae‐covered ball.

Planctomycetes / Planctomycetia / Gemmatales / Gemmataceae / Fimbriiglobus

The genus
Fimbriiglobus
is represented by planctomycetes with spherical cells, which occur singly, in pairs, or are assembled in large aggregates. Cell division occurs by means of budding; both daughter and adult cells are nonmotile. Cells are uniformly covered by numerous fimbriae and crateriform pits. Members of the genus are moderately acidophilic and mesophilic chemoorganotrophic aerobes. Most sugars and a number of polysaccharides are used as growth substrates. Type strain of the type species,
Fimbriiglobus ruber
SP5
T
, is capable of hydrolyzing chitin, which is used as a source of nitrogen. The major fatty acids are C
20:1
ω9
c
, C
16:1
ω
9
c
, and C
16:0
. The major polar lipid is trimethylornithine. This genus is a member of the phylum
Planctomycetes
, class
Planctomycetia,
order
Gemmatales
, family
Gemmataceae
. Representatives of this genus are common inhabitants of boreal and tundra wetlands.

DNA G
+
C content
(
mol
%): 64.2 (genome sequence).

Type species
:
Fimbriiglobus ruber
Kulichevskaya et al. 2017
VP
.
Virtual connection alters perspective of AUD treatment and support community
Authors: Enos Gary
Published: January 2021

If the adage holds true that most success in life lies in just showing up, then the alcohol treatment and recovery support community can claim at least one rousing victory in a tumultuous 2020. Many entities, ranging from brick‐and‐mortar outpatient treatment centers to Alcoholics Anonymous (AA) groups, have credited virtual formats with a substantial increase in engagement, signaling that a trend necessitated by the COVID‐19 crisis could long outlive the pandemic's eventual resolution.
The best and worst of 2020, and hopes and fears for 2021
Authors: Knopf Alison
Published: January 2021

The highlight of 2020 was celebrating the 50th anniversary of the establishment of the National Institute on Alcohol Abuse and Alcoholism (NIAAA) through events such as a two‐day science symposium. We now know more about how alcohol affects the brain and body across the lifespan than ever before, and we have evidence‐based interventions to prevent and treat alcohol misuse. This work has contributed to a steady decrease in underage drinking over the past two decades, and a greater understanding of the deleterious effects of prenatal alcohol exposure and the biology of alcohol use disorder and alcohol‐associated liver diseases.
Multicomponent and One‐pot Syntheses of Quinoxalines
Authors: Biesen Lukas , Müller Thomas J. J.
Published: January 2021

Quinoxalines represent bicyclic nitrogen‐containing heterocycles with a wide array of applications. They exhibit a multitude of biological activities relevant in medicinal chemistry as well as a plethora of luminescence properties. Quinoxaline syntheses exploit the whole raft of multicomponent syntheses from domino to sequential or consecutive reactions, harvesting well‐known synthetic concepts and reactions, such as Ugi‐reactions, but also leading to the development of novel reactions and sequences. Diversity‐oriented synthesis and transition metal catalyzed multicomponent reactions open efficient pathways to quinoxalines and quinoxaline‐containing moieties in a one‐pot fashion. This review outlines the underlying reaction‐based principles of multicomponent syntheses of quinoxalines and summarizes recent developments quinoxaline‐directed MCRs, illustrating their scopes.

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Direct Reductive Amination of Biobased Furans to N‐Substituted Furfurylamines by Engineered Reductive Aminase
Authors: Yang Zi‐Yue , Hao Ya‐Cheng , Hu Song‐Qing , Zong Min‐Hua , Chen Qi , Li Ning
Published: January 2021

Furfurylamines are important building blocks for the synthesis of many pharmacologically active compounds and polymers. In this work, direct reductive amination of biobased furans to N‐substituted furfurylamines by reductive aminase from Aspergillus oryzae (AspRedAm) was reported. Besides the reductive aminase activity, AspRedAm also showed a promiscuous, yet low alcohol dehydrogenase activity. The variant W210F proved to be a good catalyst for the synthesis of N‐substituted furfurylamines. Furans were transformed to the target products with the conversions up to >99% and selectivities up to >99%. In addition, N‐substituted furfurylamines were synthesized in the total turnover number (TTN) up to 3200 on a preparative scale, indicating the applicability of this biocatalytic route in synthetic chemistry.

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