Article
Green & Sustainable Science & Technology
E. Anto-Darkwah, S. M. Benson, A. Rabinovich
Summary: The study introduces an improved method for estimating sub-core properties of reservoir rocks, which is shown to be more efficient and less prone to numerical errors. Validation of the method is demonstrated in a CO2-water drainage coreflood experiment, with significantly faster computation speed compared to traditional methods.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Chemistry, Multidisciplinary
Vinay Krishnan, Hamed Khodadadi Tirkolaei, Edward Kavazanjian Jr
Summary: We propose an improved method for evaluating the activity of urease using electrical conductivity (EC) measurements. By modeling the chemical equilibrium and utilizing empirical equations, we have developed a function that relates the increase in EC during urea hydrolysis to the concentration of ammonium species present in the reaction solution. This EC-based method is inexpensive and can accurately determine urease activity for various applications.
Article
Chemistry, Multidisciplinary
Vinay Krishnan, Hamed Khodadadi Tirkolaei, Edward Kavazanjian
Summary: We propose an improved method for evaluating urease activity using electrical conductivity (EC) measurements. By combining chemical equilibrium modeling and empirical equations, we develop a function that relates the increase in EC during urea hydrolysis to the concentration of ammonium species and remaining urea. This function is applied to continuously measured EC data to determine the concentration profile of urea with time, allowing for accurate determination of urease activity. The method was compared to a colorimetric assay and showed promising results, making it a cost-effective and accurate option for evaluating urease activity.
Article
Chemistry, Analytical
Sebastian Amland Skaanvik, Lisa Irene Stephens, Samantha Michelle Gateman, Matthias Geissler, Janine Mauzeroll
Summary: Scanning electrochemical microscopy (SECM) is a mature technique for studying local electrochemical processes, but conventional methods do not fully utilize its spatial resolution. The developed quantitative feedback referencing (QFR) method improves fitting accuracy, eliminates fitting subjectivity, and avoids substrate-microelectrode contact.
ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Environmental
Bo Liu, Yanqing He, Yanhui Han, Ting Li, Dongyang Li, Rong Gao
Summary: During subway construction, the artificial freezing method is a safe and effective approach. This study used NMR technology to investigate the impact of temperature change on pore size and relaxation time, proposing a new model for the evolution of pore structure during thawing of frozen sandy soil.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Telecommunications
K. L. Neela, V Kavitha
Summary: This paper proposes a secure Cloud Storage environment without a third-party system and introduces an Improved RSA Encryption Algorithm (IREA) along with the Flexible Capacity Cuckoo Filter (FCCF) auditing technique without Third Party Auditing. The experimental results show that the proposed system has less time consumption in terms of data security.
WIRELESS PERSONAL COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Bingyu Gao, Wenjun Li, Zhuyin Chu, Lianchang Zhang
Summary: An improved solvent extraction method using ammonia and butanone instead of NaOH and acetone is presented in this paper for the chemical isolation of Re from the sample matrix. The new method eliminates the need for further purification and achieves high recovery. Comparison with other chemical methods shows that this method can completely separate Re from the matrix with low background levels.
MICROCHEMICAL JOURNAL
(2022)
Article
Energy & Fuels
Kaleb Lippiatt, Stuart Bell, Teng-Cheong Ong, Chris East, Donald McAuley, Geoffrey Will, Ted Steinberg
Summary: Proper materialographic sample preparation is crucial in electron microscopy to achieve high-quality material results, with the use of kerosene as a lubricant showing to be the best option for analyzing molten salt corrosion phenomena.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Analytical
Panteleimon G. Takis, Beatriz Jimenez, Nada M. S. Al-Saffar, Nikita Harvey, Elena Chekmeneva, Shivani Misra, Matthew R. Lewis
Summary: The SMol-ESY technology offers a unique and fully automated computational solution for the assignment and integration of H-1 nuclear magnetic resonance signals from metabolites in challenging matrices containing macromolecules. The approach provides sensitive and reliable quantitation through instant signal deconvolution and straightforward integration, with spectral resolution enhancement and macromolecular signal suppression. The algorithm's performance was evaluated using a large number of NMR serum and plasma spectra, demonstrating high assignment accuracy and reliable quantitation capabilities for targeted metabolites.
ANALYTICAL CHEMISTRY
(2021)
Article
Computer Science, Information Systems
Mohammad Goudarzi, Huaming Wu, Marimuthu Palaniswami, Rajkumar Buyya
Summary: This article proposes a weighted cost model to minimize the execution time and energy consumption of IoT applications in a computing environment with multiple IoT devices, multiple fog/edge servers, and cloud servers. Additionally, a new application placement technique based on the Memetic Algorithm is introduced for making batch application placement decisions for concurrent IoT applications. The results show that this technique significantly improves the weighted cost of IoT applications up to 65 percent compared to its counterparts.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2021)
Article
Multidisciplinary Sciences
Ibtisam Masmali, Muhammad Nadeem, Awais Yousaf, Ali Akbar, Abdul Razaq, Asima Razzaque
Summary: Counting Polynomial is a mathematical function introduced in 1936 by G. Polya for application in chemistry. This function allows for the observation of graph partitioning and the frequency of these partitions through its coefficients. A novel and efficient method has been developed to construct the necessary counting polynomials for a zigzag-edge coronoid formed by the fusion of a Starphene graph and a Kekulenes graph. The methods used in this study expand our knowledge and the findings have the potential to provide insight into the topology of these chemical structures.
SCIENTIFIC REPORTS
(2023)
Review
Pharmacology & Pharmacy
Noopur Pandey, Animesh Ghosh
Summary: Permeability is critical for the biopharmaceutical profile and therapeutic activities of pharmaceuticals. Pharmaceutical cocrystals have emerged as a novel approach to improve the permeability of poorly permeable drugs by rearranging the crystal packing through incorporating coformers into the crystal lattice.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Vasilii V. Petrenko, Andrew M. Smith, Edward M. Crosier, Roxana Kazemi, Philip Place, Aidan Colton, Bin Yang, Quan Hua, Lee T. Murray
Summary: The study presents a new method to measure atmospheric hydroxyl radical concentration using carbon-14-containing carbon monoxide as a tracer, reducing sample volume requirements while maintaining measurement precision. The method includes accurate characterization of procedural blank and was used to make measurements at the NOAA Mauna Loa Observatory. The results show a seasonal cycle and agreement with prior data from a different site.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2021)
Article
Computer Science, Theory & Methods
K. Dinesh Kumar, E. Umamaheswari
Summary: The power consumption of datacenters is increasing rapidly, and it is estimated to reach approximately 8000 TWh by 2030 if cloud resources are not utilized effectively. VM consolidation technique is a prominent solution to effectively manage cloud resources, improve server performance, and reduce power consumption. However, unnecessary actions of VM consolidation can lead to degraded resource management, poor QoS, and SLA violations. This paper proposes a proactive VM consolidation technique using an improved LSTM network to effectively manage resources, reduce power consumption, and avoid SLA violations.
Article
Automation & Control Systems
Tomas R. Cotos-Yanez, Ana Perez-Gonzalez, Beatriz Iglesias, Luis Munoz
Summary: The article presents an improved statistical approach for estimating the conformational composition of small molecules with low standard error and good p-values.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2021)
Article
Chemistry, Physical
Christopher Griffith, Hugh Daigle
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2019)
Article
Energy & Fuels
Xiao Tian, Hugh Daigle
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2019)
Article
Chemistry, Physical
Christopher Griffith, Hugh Daigle
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Geosciences, Multidisciplinary
Hugh Daigle, Julia S. Reece, Peter B. Flemings
MARINE AND PETROLEUM GEOLOGY
(2020)
Editorial Material
Geochemistry & Geophysics
E. J. Screaton, M. E. Torres, B. Dugan, K. U. Heeschen, J. J. Mountjoy, C. Ayres, P. S. Rose, I. A. Pecher, P. M. Barnes, L. J. LeVay
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2020)
Article
Environmental Sciences
Azar K. Hasanov, Brandon Dugan, Michael L. Batzle
WATER RESOURCES RESEARCH
(2020)
Article
Geosciences, Multidisciplinary
Zachary W. Murphy, David A. DiCarlo, Peter B. Flemings, Hugh Daigle
GEOPHYSICAL RESEARCH LETTERS
(2020)
Review
Geochemistry & Geophysics
Aaron Micallef, Mark Person, Christian Berndt, Claudia Bertoni, Denis Cohen, Brandon Dugan, Rob Evans, Amir Haroon, Christian Hensen, Marion Jegen, Kerry Key, Henk Kooi, Volker Liebetrau, Johanna Lofi, Brian J. Mailloux, Renee Martin-Nagle, Holly A. Michael, Thomas Mueller, Mark Schmidt, Katrin Schwalenberg, Elizabeth Trembath-Reichert, Bradley Weymer, Yipeng Zhang, Ariel T. Thomas
Summary: Offshore freshened groundwater (OFG) has been documented in most continental margins worldwide, predominantly within 55 km of the coast and down to a water depth of 100 m. Factors influencing OFG distribution include topography-driven flow, salinization via haline convection, and permeability contrasts. Advances in geochemical measurements and seismic reflection profiling have improved our understanding of OFG, but key knowledge gaps remain regarding its extent, function, and emplacement timing. Future research using isotopic age tracers and joint inversion of electromagnetic and seismic data is essential for addressing these gaps and assessing the potential use of OFG as an unconventional source of water.
REVIEWS OF GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
Hugh Daigle, Ann Cook, Yi Fang, Abhishek Bihani, Wen Song, Peter B. Flemings
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Chemistry, Physical
Hugh Daigle
Summary: Research indicates that an electrical double layer exists at the ice-water interface, with over 99% of counterions contained in the Stern layer, and the electrical conduction and polarization in the diffuse layer can be negligible.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Geochemistry & Geophysics
G. J. Crutchley, J. Elger, J. Kuhlmann, J. J. Mountjoy, A. Orpin, A. Georgiopoulou, J. Carey, B. Dugan, S. Cardona, S. Han, A. Cook, E. J. Screaton, I. A. Pecher, P. Barnes, K. Huhn
Summary: This study employs a core-log-seismic integration approach to investigate intact sediments and landslide deposits in the Tuaheni Landslide Complex. The results suggest that the basal shear zone of the landslide exploited low shear strength intervals, and the Intra-debris Reflector represents an induced weak layer rather than the landslide's basal shear zone. Free gas accumulation may have played a role in pre-conditioning the slope to failure.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Michael B. Underwood, Brandon Dugan, Sebastian Cardona
Summary: This study investigates the potential influence of clay mineral assemblages on slope stability at two sites on the Hikurangi slope in New Zealand. The results show that detrital smectite dominates the clays, but there are no evident compositional excursions along slip surfaces or weak layers. The presence of smectite decreases in the downstream direction of the East Cape Current, correlating with lower densities of slide scars. However, other factors are likely to determine slip nucleation.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Chemistry, Physical
Xiongyu Chen, Chang Da, Daniel C. Hatchell, Hugh Daigle, John-Richard Ordonez-Varela, Christophe Blondeau, Keith P. Johnston
Summary: The surface of silica nanoparticles (NP) was modified with two amino ligands to achieve colloidal stability and interfacial activity. The modified NP, when combined with a like-charged diamine surfactant, resulted in ultra-stable CO2 foam at low NP concentrations.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Geochemistry & Geophysics
David Fukuyama, Hugh C. Daigle, Michael A. Nole, Wen Song
Summary: Short-range diffusion and long-range advection are the main mechanisms for transporting methane. This study introduces a new mechanism, density-driven convection, which is driven by hydrate formation and salt exclusion in the pore water. The study demonstrates the rapid transport of aqueous methane throughout the sand layer with convection compared with diffusion.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Lisa McNeill, Brandon Dugan, Katerina Petronotis, Kitty Milliken, Jane Francis
SCIENTIFIC DRILLING
(2020)
