1,103 research outputs found
Possible molecular states from interactions of charmed baryons
In this work, we perform a systematic study of possible molecular states
composed of two charmed baryons including hidden-charm systems
, , and
, and corresponding double-charm systems
, , and
. With the help of the heavy quark chiral effective
Lagrangians, the interactions are described with , , ,
, , and exchanges. The potential kernels are
constructed, and inserted into the quasipotential Bethe-Salpeter equation. The
bound states from the interactions considered is studied by searching for the
poles of the scattering amplitude. The results suggest that strong attractions
exist in both hidden-charm and double-charm systems considered in the current
work, and bound states can be produced in most of the systems. More experiment
studies about these molecular states are suggested though the nucleon-nucleon
collison at LHC and nucleon-antinucleon collison at .Comment: 7 pages, 5 figure
Toward Reproducing Network Research Results Using Large Language Models
Reproducing research results in the networking community is important for
both academia and industry. The current best practice typically resorts to
three approaches: (1) looking for publicly available prototypes; (2) contacting
the authors to get a private prototype; and (3) manually implementing a
prototype following the description of the publication. However, most published
network research does not have public prototypes and private prototypes are
hard to get. As such, most reproducing efforts are spent on manual
implementation based on the publications, which is both time and labor
consuming and error-prone. In this paper, we boldly propose reproducing network
research results using the emerging large language models (LLMs). In
particular, we first prove its feasibility with a small-scale experiment, in
which four students with essential networking knowledge each reproduces a
different networking system published in prominent conferences and journals by
prompt engineering ChatGPT. We report the experiment's observations and lessons
and discuss future open research questions of this proposal. This work raises
no ethical issue
6-Amino-3-methyl-4-(3-nitrophenyl)-1-phenyl-1H,4H-pyrano[2,3-c]pyrazole-5-carbonitrile
The title compound, C20H15N5O3, was synthesized by the one-pot reaction of a four-component reaction protocol in aqueous medium. The pyrano[2,3-c]pyrazole system is essentially planar, with a maximum deviation of 0.026 (2) Å. The 3-nitrophenyl and phenyl rings make dihedral angles of 81.11 (5) and 13.36 (1)°, respectively, with the mean plane of the pyrano[2,3-c]pyrazole ring. The crystal structure is stabilized by N—H⋯N hydrogen bonds, which form infinite chain propagating along the c axis and by N—H⋯O hydrogen bonds, which form infinite chains propagating along the a axis. There are also N—O⋯N—C dipole–dipole interactions along the a axis with an O⋯N distance of 3.061 (3) Å, which is shorter than that of the N—H⋯O hydrogen bond [3.196 (3) Å]
Mn(PtPd)P: Isovalent Tuning of Mn Sublattice Magnetic Order
We report the growth and characterization of MnPdP, a ferromagnet with
T 295 K, and conduct a substitutional study with its
antiferromagnetic analogue MnPtP. We grow single crystals of MnPdP and
Mn(PtPd)P by adding Mn into (PtPd)-P based melts.
All compounds in the family adopt the layered anti-CeCoIn structure with
space group P4/mmm, and EDS and XRD results indicate that MnPtP and
MnPdP form a solid solution. Based on magnetization and resistance data, we
construct a T-x phase diagram for Mn(PtPd)P and demonstrate the
antiferromagnetic order found in MnPtP is extraordinarily sensitive to Pd
substitution. At low Pd fractions (x 0.010), the single antiferromagnetic
transition in pure MnPtP splits into a higher temperature ferromagnetic
transition followed on cooling by a lower temperature ferromagnetic to
antiferromagnetic transition and then by a re-entrant antiferromagnetic to
ferromagnetic transition at lower temperatures. The antiferromagnetic region
makes up a bubble that persists to x 0.009 for T 150 K,
with all samples x 0.009 recovering their initial ferromagnetic state with
further cooling to base temperature. Over the same low x range we find a
non-monotonic change in the room temperature unit cell volume, further
suggesting that pure MnPtP is close to an instability. Once x 0.010,
Mn(PtPd)P undergoes a single ferromagnetic transition. The
Curie temperature increases rapidly with x, rising from T 197 K
at x = 0.013 to a maximum of T 312 K for x 0.62, and
then falls back to T 295 K for pure MnPdP (x = 1). Given that
Pt and Pd are isoelectronic, this work raises questions as to the origin of the
extreme sensitivity of the magnetic ground state in MnPtP upon introducing
Pd
Scientific Publications in Nephrology and Urology Journals from Chinese Authors in East Asia: A 10-Year Survey of the Literature
BACKGROUND: Diseases of the kidneys and genitourinary tract are common health problems that affect people of all ages and demographic backgrounds. In this study, we compared the quantity and quality of nephrological and urological articles published in international journals from the three major regions of China: the mainland (ML), Hong Kong (HK), and Taiwan (TW). METHODS: Nephrological and urological articles originating from ML, TW, and HK that were published in 61 journals from 1999-2008 were retrieved from the PubMed database. We recorded the numbers of total articles, clinical trials, randomized controlled trials, case reports, impact factors (IF), citations, and articles published in the leading general-medicine journals. We used these data to compare the quantity and quality of publication output from the three regions. RESULTS: The total number of articles increased significantly from 1999 to 2008 in the three regions. The number of articles from ML has exceeded that from HK since 2004, and surpassed that from TW in 2008. Publications from TW had the highest accumulated IF, total citations of articles, and the most articles published in leading general-medicine journals. However, HK publications had the highest average IF. Although ML produced the largest quantity of articles, it exhibited the lowest quality among the three regions. CONCLUSION: The number of nephrological and urological publications originating from the three major regions of China increased significantly from 1999 to 2008. The annual number of publications by ML researchers exceeded those from TW and HK. However, the quality of articles from TW and HK was higher than that from ML
Biomarkers for Early Diagnostic of Mild Cognitive Impairment in Type-2 Diabetes Patients: A Multicentre, Retrospective, Nested Case–Control Study
AbstractBackgroundBoth type 2 diabetes mellitus (T2DM) and Alzheimer's disease (AD) are common age-associated disorders and T2DM patients show an increased risk to suffer from AD, however, there is currently no marker to identify who in T2DM populations will develop AD. Since glycogen synthase kinase-3β (GSK-3β) activity, ApoE genotypes and olfactory function are involved in both T2DM and AD pathogenesis, we investigate whether alterations of these factors can identify cognitive impairment in T2DM patients.MethodsThe cognitive ability was evaluated using Minimum Mental State Examination (MMSE) and Clinical Dementia Rating (CDR), and the mild cognitive impairment (MCI) was diagnosed by Petersen's criteria. GSK-3β activity in platelet, ApoE genotypes in leucocytes and the olfactory function were detected by Western/dot blotting, the amplification refractory mutation system (ARMS) PCR and the Connecticut Chemosensory Clinical Research Center (CCCRC) test, respectively. The odds ratio (OR) and 95% confidence intervals (95% CI) of the biomarkers for MCI diagnosis were calculated by logistic regression. The diagnostic capability of the biomarkers was evaluated by receiver operating characteristics (ROC) analyses.FindingsWe recruited 694 T2DM patients from Jan. 2012 to May. 2015 in 5 hospitals (Wuhan), and 646 of them met the inclusion criteria and were included in this study. 345 patients in 2 hospitals were assigned to the training set, and 301 patients in another 3 hospitals assigned to the validation set. Patients in each set were randomly divided into two groups: T2DM without MCI (termed T2DM-nMCI) or with MCI (termed T2DM-MCI). There were no significant differences for sex, T2DM years, hypertension, hyperlipidemia, coronary disease, complications, insulin treatment, HbA1c, ApoE ε2, ApoE ε3, tGSK3β and pS9GSK3β between the two groups. Compared with the T2DM-nMCI group, T2DM-MCI group showed lower MMSE score with older age, ApoE ε4 allele, higher olfactory score and higher rGSK-3β (ratio of total GSK-3β to Ser9-phosphorylated GSK-3β) in the training set and the validation set. The OR values of age, ApoE ε4 gene, olfactory score and rGSK-3β were 1.09, 2.09, 1.51, 10.08 in the training set, and 1.06, 2.67, 1.47, 7.19 in the validation set, respectively. The diagnostic accuracy of age, ApoE ε4 gene, olfactory score and rGSK-3β were 0.76, 0.72, 0.66, 0.79 in the training set, and 0.70, 0.68, 0.73, 0.79 in the validation set, respectively. These four combined biomarkers had the area under the curve (AUC) of 82% and 86%, diagnostic accuracy of 83% and 81% in the training set and the validation set, respectively.InterpretationAging, activation of peripheral circulating GSK-3β, expression of ApoE ε4 and increase of olfactory score are diagnostic for the mild cognitive impairment in T2DM patients, and combination of these biomarkers can improve the diagnostic accuracy
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