bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Processing Approach to the Reduction of the lnfill Marine 3-D Acquisition
Authors: Spitz Simon , Huard Irène 
Published: October 2008

Abstract
The cost and turnaround of the seismic acquisition offshore have been drastically reduced in the last decade. One may argue that the industry has reached a stage where no more gains can be made in terms of cost or turnaround. However, time sharing and infill acquisition still represent a heavy burden on the exploration budgets. In this respect, we present this paper a technique that aims at populating gaps in the coverage. When these gaps are small the technique replaces the widely used flex binning. When these gaps are large, the technique aims at reducing the infill acquisition. In this paper we test the technique on a swath from a survey that required a heavy infill. The comparison between the output of the propsed technique applied to the primary acquisition only and the total acquisition (primary and infill) data set shoes that this reconstruction scheme fills correctly the gaps in the coverage. The technique can therefore be considered as a processing approach to the reduction of the infill in marine 3-D acquisition.

Introduction
For commodity reasons, most of the algorithms commonly used in 3-D seismic data processing assume that the traces are regularly distributed on a grid. Obviously, the character of the marine acquisition itself, the state of the sea, the effects of currents and tides, cause some departures from the ideal currents and tides cause some departures from the ideal regular geometry. It is a fact of life that the marine seismic acquisition is intrinsically irregular in the sense that the recorded traces are never located where one wishes them to be. While small irregularities have little impact, irregularities that lead to gaps in the coverage can adversely affect the quality of the final result. Small gaps in the coverage cannot in general be avoided. The simplest and the widely accepted solution to filling such gaps is flex-binning. Flex binning is nothing else than copying a trace from a filled bin into an empty bin. The range of the flex obviously depends on the dips present in the data set. However, from a practical point of view. an offset dependent range is fixed for a whole survey by testing. In this respect, one can ask if a more sophisticated interpolation scheme could not populate the empty bins even beyond what is nowadays considered as a reasonable range for flex binning. The answer to this question can have a dramatic impact on the marine 3-D acquisition in terms of cost and turnaround. Indeed, when the gaps in the coverage due to currents and subsequent streamers feathering exceed some contractual specitications closely related to the flexing expected range. the vessel has to return and re shoot some portions of the survey. An infill of the order of 10% is common and sometimes it can amount to as much as 50% of the main (primary) acquisition. Obviously, this infill not only increases the cost of the survey but impacts also on the planning of the off shore exploration.
MEGATHYST - A Compact Dynamically Positioned Semisub for Deep Waters
Authors: Ubisch B.V. , Roodenburg J. 
Published: October 2008

Abstract
MSV Amethyst is a compact, fully Dynamically Positioned semisub, designed for workover on subsea wells in the North Sea, supplied in 1987. In 1996 a new rig, based on the Amethyst, was designed with drilling capacities for deep water applications (1200 – 1500 m). The capacities of this new design should match with those of a large drilling vessel. In order to be able to design such a drilling vessel, close cooperation with the drilling equipment suppliers and the drilling operator was necessary to get a cost effective compact light weight semi submersible. This paper describes the process of upgrading the design of the workover unit into a deep water drilling vessel. This involves:– The increase of the payload from 1700 to 4000 tomes.– Design of the powerplant / DP system according IMO DP Class 3.– Reduction of the amount of steel used to build the vessel.– Design of the box girder derrick to reduce the amount of steel and thus weight of the derrick.– Vertical storage of risers in the aft columns of the vessel to lower the centre of gravity.– Integration of the drilling equipment in order to reduce the building time of the vessel in the yard, the weight due to the reduction of the amount of steel needed and as a result costs.– Dual derrick design for simultaneous operations like preparing casing or riser while drilling.

Introduction
In the beginning of 1980's five dynamically positioned diving support vessels were built by our yard for different owners (Fig 1). During the design and construction of these vessels the design team was asked to investigate the possibility of carrying-out workover through a moonpool in the aft deck. A demand for workover on the various subsea wellheads, being installed in the North Sea, was expected (Fig 2). After studying motion-study characteristics the amount of expected downtime was not acceptable to the field operator. The starting-point of carrying-out workover from a monohull was quickly abandoned and, also based on the experience of diving support vessels, a semi-submersible structure was adapted. The market approach was using a dynamic positioned vessel (DP) for workover in the summer and in the winter, as a diving support vessel. The diving work would consist of hyper baric welding, installing templates and spool pieces etc. The vessel, supplied in 1987, started working in the Northsea in 1988 and was named M.S.V. Amethyst (Fig 3). Due to the market situation in 1987 / 1988 the workover equipment was not installed. The vessel was used as a diving support-installation vessel in the North Sea until the beginning of 1995. In 1995 the owners / operators of the vessel were contracted to carry-out workover in Brazil. After completing the workover equipment the vessel left for Brazil in the middle of 1996 (Fig 4).

MEGATHYST design concept
In 1996 the design team of the Amethyst was asked to develop a new design based on the Amethyst. However the operators demanded better performances for drilling in deeper water.
The Indian OTEC Program
Authors: Jayashankar V. , Purnima J. , Ravindran M. , Mitsumori M. , lkegami Y. , Uehara H. 
Published: October 2008

Abstract
It is planned to construct a pilot floating OTEC plant with a rating of 1MW gross off the coast of India. Preliminarydesign calculations that impact on the sea water systems have been completed. The factors that affect the choice of configuration for the cold water pipe and mooring are discussed. At smaller ratings the cost of the sea water systems is likely to be a larger fraction of the overall plant cost and thus merits detailed investigations.

Introduction
Commercial energy consumption (coal, oil & gas, electricity)in India has increased from 19.76 million tonnes of coal equivalent (MTCE) in 1953–54 to 101.5 MTCE in 1990-91. The contribution by coal, oil & gas and electricity for the latter period is 39, 43.4 and 17.6 percent respectively [1]. As of 1996–97 the lifespan of known reserves of oil & gas is around 20 years and coal reserves are estimated to last for about 200 years. The installed capacity of electrical generation is 96000 MW (1996–97) and is insufficient to meet the current demand. In such a scenario, the development of alternative sources of energy is an imperative. Further, it would be desirable to pursue an energy resource that can be utilised in a sustainable manner. This is possible through renewable sources. For tropical countries with a long coast line, ocean thermal energy conversion (OTEC) appears to be a promising source.
Ocean Thermal Energy or OTEC harnesses energy through the natural thermal gradient of the ocean depths which acts as a heat engine for a thermodynamic cycle. In tropical countries like India, this temperature difference is above 20°C between the surface of the ocean and at a depth of800-100Om and the annual fluctuation in this value is only l°C. Based on this temperature difference, the area of OTEC resource within India's EEZ is estimated to be 1.5 × 106 km 2. An acceptable power density for OTEC plants has been estimated by researchers to be 0.2 MW/km2. With such a spacing, and allowing 40° for parasitic losses in the OTEC plants, the estimated OTEC potential in India is around 180, OOOMW,
Previous calculations have shown that floating OTEC plants can be competitive at ratings of the order of 50MW. [2]. While the ultimate aim is to build plants of such ratings, a demonstration pilot plant of a smaller capacity to validate the design of subsystems such as heat exchangers, turbine, and sea water systems appears rational. This paper attempts to study the advantages and disadvantages of variousconfigurations of the sea water systems (cold water pipe and moorings) with respect to the complexity, feasibility and cost in the Indian context.

Conceptual basis for pilot plant
Based on the bathymetry of the ocean, three options for OTEC plants exist. They could be land based, shelf based or floating plants. Land based plants are feasible in the islands of India.
Optimizing CO2 Adsorption/Desorption via the Coupling of Imidazole and Carbon Nanotubes Paper for Spontaneous CO2 Uptake from Ambient Air and Solar‐Driven Release
Authors: Li Chujia , Cao Xuebo , Liu Guangchun , Huang Lin , Chu Mingming , Cheng Ruobing , Wang Aijun , Xu Zhen 
Published: April 2024

AbstractDirect air capture (DAC) is a sustainable technology to alleviate the greenhouse effect and a reliable pathway to acquire inexhaustible CO2 for the production of costly chemicals and energy products. Current DAC technologies with amine‐related sorbents rely on chemisorption, while they consume intensive energy for CO2 release and sorbent regeneration by heating. Developing new DAC processes with weak, reversible adsorption can substantially reduce the regeneration energies. Herein, the design of CO2 breathing paper (CBP) is demonstrated toward spontaneous CO2 extraction from ambient air and solar‐driven regeneration. The CBP is fabricated by coupling 2‐ethyl‐4‐methylimidazole to carbon nanotube paper on the basis of density functional theory calculations. At ambient conditions, CBP spontaneously captures atmospheric CO2 with a capacity of 0.14–1.75 mmol g–1 at 0–35 °C through non‐covalent electrostatic interaction. Upon exposure to sunlight, all adsorbed CO2 can be released and converted to concentrated gas for storage. Attractively, the efficiency of solar‐driven CO2 release is much higher than the traditional temperature‐swing method owing to the IR sensitivity of CO2. Besides the reversibility, the mild conditions also ensure the durability of CBP. These findings suggest that the CBP is a promising candidate for cost‐effective DAC.
Advanced Flexible Sensing Technologies for Soft Robots
Authors: Qu Juntian , Cui Guangming , Li Zhenkun , Fang Shutong , Zhang Xianrui , Liu Ang , Han Mingyue , Liu Houde , Wang Xueqian , Wang Xiaohao 
Published: April 2024

AbstractSoft robots have recently attracted increasing interest due to their advantages in durability, flexibility, and deformability, which enable them to adapt to unstructured environments and perform various complex tasks. Perception is crucial for soft robots. To better mimic biological systems, sensors need to be integrated into soft robotic systems to obtain both proprioceptive and external perception for effective usage. This review summarizes the latest advancements in flexible sensing feedback technologies for soft robotic applications. It begins with an introduction to the development of various flexible sensors for soft robots, followed by an in‐depth exploration of smart materials and advanced manufacturing methods. A detailed description of flexible sensing modalities and methodologies is also included in the review to illustrate the continuous breakthrough of the technology. In addition, the applications of soft robots based on these advanced sensing technologies are concluded as well. The challenges of flexible sensing technologies for soft robots and promising solutions are finally discussed and analyzed to provide a prospect for future development. By examining the recent advances in intelligent flexible sensing technologies, this review is dedicated to highlighting the potential of soft robotics and motivating innovation within the field.
GABAA Receptor‐Specific Carbon Dots for High‐Contrast Hepatocellular Carcinoma Imaging and Differentiation
Authors: Guo Yifei , Sun Yuanqiang , Geng Xin , Wang Junli , Hu Jingyu , Song Rong‐Bin , Yang Ran , Qu Lingbo , Li Zhaohui 
Published: April 2024

AbstractTargeted fluorescence probes for imaging and differentiation of hepatocellular carcinoma (HCC) are highly desirable from its scientific research and clinical applications. However, most of the current targeted fluorescence probes focus on the variation of intracellular microenvironment caused by the cancerization of hepatocyte, which causes a fluorescence intensity alteration but fails to produce a spatial differentiation due to the lack of robust parameters for further improving accuracy. Herein, the study develops a new fluorescent carbon dot (CTF‐CDs) that can target the overexpressed GABAA receptor (GABAAR) on cell membrane for accurate and high‐contrast imaging of HCC and differentiation. The competition response between CTF‐CDs and typical receptor‐binding ligands reveals their affinity toward the picrotoxin‐binding site of GABAAR. Based on this GABAAR‐targeting ability, accurate imaging of HCC cells is realized by lighting their membranes, along with a big difference from the intracellular fluorescence of normal liver cells and other cancer cells. In addition, the CTF‐CDs have also been used to visualize the anticancer drug‐induced variations on HCC cell membrane and fluorescent imaging in HCC tissue. This work extends the targeting object of fluorescence probes from intracellular microenvironment to membrane protein, adding a new dimension to the imaging and differentiation of HCC.
3D Printable Multifunctional Electrochemical Nano‐Doped Biofilament
Authors: Koukouviti Eleni , Economou Anastasios , Kokkinos Christos 
Published: April 2024

AbstractFused deposition modeling (FDM) represents a state‐of‐the‐art 3D printing technology that holds great promise in the field of electrochemistry as a fast, in‐house, and digital fabrication method of sustainable sensors. Despite the progress in FDM, existing practical 3D printed sensors still require post‐printing treatment to improve their operational features, either through (electro)chemical surface activation or surface modification with external functional materials. Herein, a novel lab‐made conductive biofilament with integrated two different types of metallic nanoparticles (NPs) for the 3D printing of ready‐to‐use and multiplexed electrochemical sensors is introduced. The filament is composed of biodegradable polylactic acid as a base, polyethylene glycol dimethyl ether as a plasticizer, carbon black as a conductive filler, and nanopowder oxides of bismuth and copper as integrated functional precursor materials. The as‐printed sensors serve as multifunctional transducers for the direct and sensitive determinations of several analytes, by exploiting the different properties of the two co‐existing NPs. Particularly, heavy metals (such as lead, and cadmium) are voltammetrically quantified by amalgamation with BiNPs electrogenerated from Bi2O3, while biomarkers (such as glucose, and uric acid) are determined in enzymatic‐free modes. Determination of glucose takes advantage of the electrocatalytic properties of CuO, while uric acid is directly oxidized at the sensor.
Designing Strong Polarity and High Configurational Entropy Flexible Units toward Excellent Ultraviolet Nonlinear Optical Materials
Authors: Tian Haotian , Lin Chensheng , Li Bingxuan , Zhao Xin , Yan Tao , Ye Ning , Luo Min 
Published: April 2024

AbstractPolar materials play a crucial role in numerous essential fields; however, efficiently synthesizing them remains a significant challenge. In this study, a viable approach is proposed to enhance the probability of discovering polar materials by developing new functional basic units (FBUs) with strong polarity and high configurational entropy. To validate this approach, a site‐modification strategy is applied to the high configurational entropy flexible (C3H2O4)2− FBU, resulting in the development of four new polar‐enhancing FBUs: (C3(CH3)2O4)2−, (C3F2O4)2−, (C3H(OH)O4)2−, and (C3HFO4)2−. Moreover, 11 new compounds through temperature‐driven conformational changes in FBUs are successfully synthesized. Among these, the proportion of polar structures reaches an impressive 54%. Remarkably, all of these novel polar compounds exhibit outstanding nonlinear optical (NLO) properties. The [Li2C3(CH3)2O4]2·3H2O demonstrates the rare coexistence of a moderate birefringence (0.071@514 nm), short UV cutoff edge (210 nm), and the strongest second harmonic generation (SHG) effect (6.5 × KDP) among ionic‐organic fourth harmonic generation crystals. Preliminary laser experiments have also proven its potential practical value as a fourth harmonic generation crystal. This research not only discovers a variety of exceptional UV NLO crystals but also provides a feasible method to increase the likelihood of finding polar materials.
Precision Engineering of Nanorobots: Toward Single Atom Decoration and Defect Control for Enhanced Microplastic Capture
Authors: Jancik‐Prochazkova Anna , Kmentova Hana , Ju Xiaohui , Kment Stepan , Zboril Radek , Pumera Martin 
Published: April 2024

AbstractNanorobots are being received with a great attention for their move‐sense‐and‐act capabilities that often originate from catalytic decomposition of fuels. In the past decade, single‐atom engineering has demonstrated exceptional efficiency in catalysis, energy‐related technologies, and medicine. Here, a novel approach involving point defect engineering and the incorporation of platinum (Pt) single atoms and atomic level species onto the surface of titanium dioxide nanotubes (TiO2‐NT)‐based nanorobots is presented and its impact on the propulsion capabilities of the resulting nanorobots is investigated. The achievement of point defect engineering is realized through the annealing of TiO2‐NT in a hydrogen atmosphere yielding to the point‐defect decorated nanotube (TiO2‐HNT) nanorobots. Subsequently, the atomic level Pt species decorated TiO2 nanotube (TiO2‐SA‐NT) nanorobots are achieved through a wet‐chemical deposition process. Whereas TiO2‐SA‐NT nanorobots showed the highest negative photogravitaxis when irradiated with ultraviolet (UV) light, TiO2‐HNT nanorobots reached the highest velocity calculated in 2D. Both TiO2‐HNT and TiO2‐SA‐NT nanorobots demonstrated a pronounced affinity for microplastics, exhibiting the capability to irreversibly capture them. This pioneering approach utilizing point‐defect and atomic level Pt species nanorobotics is anticipated to pave the way for highly efficient solutions in the remediation of nano‐ and microplastics and related environmental technologies.
Self‐Powered Hydrogen Production From Seawater Enabled by Trifunctional Exfoliated PtTe Nanosheet Catalysts
Authors: Yu Zhipeng , D'Olimpio Gianluca , Huang Haoliang , Kuo Chia‐Nung , Lue Chin Shan , Nicotra Giuseppe , Lin Fei , Boukhvalov Danil W. , Politano Antonio , Liu Lifeng 
Published: April 2024

AbstractSeawater electrolysis (SWE) is proposed to be a promising approach to green hydrogen (H2) production but its large‐scale deployment faces challenges because of the anodic competing chlorine evolution reaction (CER) and high energy consumption. To address these challenges, innovative hybrid SWE systems have recently emerged, able to mitigate the interference of CER and substantially reduce the electrical energy needed. Herein, the preparation of 2D layered PtTe nanosheets (e‐PtTe NSs) using the liquid‐phase exfoliation method is reported, which show outstanding electrocatalytic performance for the hydrogen evolution (HER), hydrazine oxidation (HzOR), and oxygen reduction reactions (ORR) in seawater. Using e‐PtTe NSs as trifunctional catalysts, two hybrid SWE systems are demonstrated: 1) a hydrazine‐assisted acid‐alkaline dual‐electrolyte seawater electrolyzer enabled by a bipolar membrane (BPM‐OHzSWE), which can simultaneously produce H2 and generate electricity through harvesting the electrochemical neutralization energy and leveraging the advantage of the HzOR over the oxygen evolution reaction (OER) in terms of anodic potentials; 2) a hydrazine‐assisted SWE system powered by a direct hydrazine fuel cell (DHzFC), which can realize self‐powered H2 production. These novel hybrid SWE systems show substantial promise for energy‐saving and cost‐effective production of H2 from seawater.
Pyridine‐2,6‐Dicarboxamide Proligands and their Cu(II)/Zn(II) Complexes Targeting Staphylococcus Aureus for the Attenuation of In Vivo Dental Biofilm
Authors: Chaudhary Kajal , Agrahari Bhumika , Biswas Bhumika , Chatterjee Niranjan , Chaudhary Ayushi , Kumar Ashwini , Sonker Himanshu , Dewan Sayari , Saxena Deepanshi , Akhir Abdul , Malhotra Nidhi , Chopra Sidharth , Misra Santosh , Matheswaran Saravanan , Singh Ritika Gautam 
Published: April 2024

AbstractIn the pursuit to combat stubborn bacterial infections, particularly those stemming from gram‐positive bacteria, this study is an attempt to craft a precision‐driven platform characterized by unparalleled selectivity, specificity, and synergistic antimicrobial mechanisms. Leveraging remarkable potential of metalloantibiotics in antimicrobial applications, herein, this work rationally designs, synthesizes, and characterizes a new library of Pyridine‐2,6‐dicarboxamide ligands and their corresponding transition metal Cu(II)/Zn(II) complexes. The lead compound L11 demonstrates robust antibacterial properties against Staphylococcus aureus (Minimum Inhibitory Concentration (MIC) = 2–16 µg mL−1), methicillin and vancomycin‐resistant S. aureus (MIC = 2–4 µg mL−1) and exhibit superior antibacterial activity when compared to FDA‐approved vancomycin, the drug of last resort. Additionally, the compound exhibits notable antimicrobial efficacy against resistant enterococcus strains (MIC = 2–8 µg mL−1). To unravel mechanistic profile, advanced imaging techniques including SEM and AFM are harnessed, collectively suggesting a mechanistic pathway involving cell wall disruption. Live/dead fluorescence studies further confirm efficacy of L11 and its complexes against S. aureus membranes. This translational exploration extends to a rat model, indicating promising in vivo therapeutic potential. Thus, this comprehensive research initiative has capabilities to transcends the confines of this laboratory, heralding a pivotal step toward combatting antibiotic‐resistant pathogens and advancing the frontiers of metalloantibiotics‐based therapy with a profound clinical implication.