In most studies for the quantification of the third law of thermodynamics, the minimum temperature which can be achieved with a long but finite-time process scales as a negative power of the process duration. In this article, we use our recent complete solution for the optimal control problem of the quantum parametric oscillator to show that the minimum temperature which can be obtained in this system scales exponentially with the available time. The present work is expected to motivate further research in the active quest for absolute zero.
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http://dx.doi.org/10.1103/PhysRevE.96.042103 | DOI Listing |
J Physiol
December 2024
Marine Mammal Research Program, Hawai'i Institute of Marine Biology, University of Hawai'i at Mānoa, Kāne'ohe, HI, USA.
Improving our understanding of energy allocation in reproduction is key for accurately parameterizing bioenergetic models to assess population responses to environmental perturbations and anthropogenic disturbance. We quantified the energetic cost of gestation in humpback whales (Megaptera novaeangliae) using historical whaling records, non-invasive unoccupied aerial system (UAS) photogrammetry and post mortem tissue samples. First, we estimated relative birth size using body length measurements of 678 mother-fetus pairs from historical whaling records and 987 mother-calf pairs measured in situ using UAS-photogrammetry.
View Article and Find Full Text PDFJ Clin Lipidol
November 2024
Lipids and Cardiovascular Risk Service, Department of Cardiology, Imperial College Healthcare NHS Trust, London, UK (Drs Jones, Abdel-Malek, Loyse, and Ray, and Cegla); Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, UK (Drs Jones and Cegla). Electronic address:
Background And Aims: To determine the effect of evolocumab treatment in patients with asymptomatic carotid artery stenosis ≥50% on carotid plaque morphology and composition, as determined by magnetic resonance imaging.
Methods: We conducted a double-blind randomized controlled trial in patients with asymptomatic carotid artery plaque with ≥50% stenosis and low-density lipoprotein-associated cholesterol (LDL-C) ≥1.8 mmol/L, despite standard lipid-lowering therapy, with 12 months of evolocumab or placebo injection every two weeks.
J Chem Phys
June 2024
Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
A new combined density functional theory and multi-reference configuration interaction (DFT/MRCI) Hamiltonian parameterized solely using the benchmark ab initio vertical excitation energies obtained from the QUEST databases is presented. This new formulation differs from all previous versions of the method in that the choice of the underlying exchange-correlation (XC) functional employed to construct the one-particle (orbital) basis is considered, and a new XC functional, QTP17, is chosen for its ability to generate a balanced description of core and valence vertical excitation energies. The ability of the new DFT/MRCI Hamiltonian, termed QE8, to furnish accurate excitation energies is confirmed using benchmark quantum chemistry computations, and a mean absolute error of 0.
View Article and Find Full Text PDFIn the quest for sustainable urban development, precise quantification of urban green space is paramount. This research delineates the implementation of a Cosine Adaptive Particle Swarm Optimization Long Short-Term Memory (CAPSO-LSTM) model, utilizing a comprehensive dataset from Beijing (1998-2021) to train and test the model. The CAPSO-LSTM model, which integrates a cosine adaptive mechanism into particle swarm optimization, advances the optimization of long short-term memory (LSTM) network hyperparameters.
View Article and Find Full Text PDFJ Pak Med Assoc
May 2024
University Institute of Physical Therapy, The Universit y of Lahore, Lahore, Pakistan.
Objective: To translate, culturally adapt and psychometrically analyse the Urdu version of the Victorian Institute of Spor t Assessment-Achilles questionnaire.
Methods: The cross-sec tional study was conducted at the Pak istan Sports Board, Lahore, Pakistan, from June 17, 2021, to February 15, 2022, and comprised patients with Achilles tendinopathy in group A and healthy controls in group B. Beaton's guidelines for cultural adaptation and validation for self-repor ted measures were followed to translate and validate the Victorian Institute of Sport Assessment-Achilles questionnaire in Urdu language.
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