Application of Electrochemical Sensor Based on the Reaction of Potassium Ferricyanide and Uric Acid in Uric Acid Detection

At present, the number of patients with hyperuricemia and gout in China is increasing year by year, and the demand for uric acid detection is increasing. In the current situation, a uric acid detection chip was designed based on the redox reaction between potassium ferricyanide and uric acid and the principle of electrochemical sensor, and the uric acid content was measured by the electrochemical detection chip and the software PSTrace5.8, and the error of the result was within ±10%. The method is low cost and high accuracy, which can provide a new technical means for uric acid detection

Public sentiment analysis and topic modeling regarding ChatGPT in mental health on Reddit: Negative sentiments increase over time

In order to uncover users' attitudes towards ChatGPT in mental health, this study examines public opinions about ChatGPT in mental health discussions on Reddit. Researchers used the bert-base-multilingual-uncased-sentiment techniques for sentiment analysis and the BERTopic model for topic modeling. It was found that overall, negative sentiments prevail, followed by positive ones, with neutral sentiments being the least common. The prevalence of negative emotions has increased over time. Negative emotions encompass discussions on ChatGPT providing bad mental health advice, debates on machine vs. human value, the fear of AI, and concerns about Universal Basic Income (UBI). In contrast, positive emotions highlight ChatGPT's effectiveness in counseling, with mentions of keywords like "time" and "wallet." Neutral discussions center around private data concerns. These findings shed light on public attitudes toward ChatGPT in mental health, potentially contributing to the development of trustworthy AI in mental health from the public perspective.Comment: 11 pages.8 figures, 2 table

Pure Spin Photocurrent in Non-centrosymmetric Crystals: Bulk Spin Photovoltaic Effect

Spin current generators are critical components for spintronics-based information processing. In this work, we theoretically and computationally investigate the bulk spin photovoltaic (BSPV) effect for creating DC spin current under light illumination. The only requirement for BPSV is inversion symmetry breaking, thus it applies to a broad range of materials and can be readily integrated with existing semiconductor technologies. The BSPV effect is a cousin of the bulk photovoltaic (BPV) effect, whereby a DC charge current is generated under light. Thanks to the different selection rules on spin and charge currents, a pure spin current can be realized if the system possesses mirror symmetry or inversion-mirror symmetry. The mechanism of BPSV and the role of the electronic relaxation time $\tau$ are also elucidated. We apply our theory to several distinct material systems, including transition metal dichalcogenides, anti-ferromagnetic $\rm MnBi_2Te_4$, and the surface of topological crystalline insulator cubic $\rm SnTe$.Comment: 21 pages, 4 figure

Minimally invasive flapless vs. flapped approach for single implant placement: a 2‐year randomized controlled clinical trial

PurposeThe purpose of this 2‐year randomized controlled clinical trial was to assess the differences in implant survival rates, soft tissue preservation, patient centered outcome and crestal bone changes applying the minimally invasive (MI) flapless approach for single implant placement compared to flapped implant surgery (FS).Materials and methodsSubjects eligible for this study were randomly assigned into two groups: MI or FS. Items of evaluation were the following: implant installation position, soft tissue healing, post‐surgical pain, soft tissue outcome, marginal bone loss (MBL), and implant survival rate.ResultsForty subjects (14 women and 26 men, 20 in MI group and 20 in FS group with a mean of 39 ± 13.2 years old) were included in the study. None of the implants demonstrated dehiscence or loss during the follow‐up. Subjects in MI group showed significantly lower post‐surgical pain and significantly less wound healing index scores at 1‐week follow‐up. The width of keratinized mucosa decreased from a mean of 4.2 ± 1.6 mm pre‐surgically to 3.7 ± 1.1 mm at crown delivery but remained stable at 2‐year follow‐up in MI group. At every appointment in the study, no statistical significant difference of PD and MBL was found between the two groups.ConclusionCompared with FS, single implants placed applying the MI technique in selected subjects showed advantages in improving patient comfort and decreasing post‐implant placement soft tissue reaction. Meanwhile, implants with MI approach have the same level of MBL and high success rates as FS procedure at 2‐year follow‐up. The deduction of keratinized mucosa is very limited and the width of KM remained stable with MI approach at 2‐year follow‐up.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/137279/1/clr12875.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137279/2/clr12875_am.pd

Exponentially Enhanced non-Hermitian Cooling

Certain non-Hermitian systems exhibit the skin effect, whereby the wavefunctions become exponentially localized at one edge of the system. Such exponential amplification of wavefunction has received significant attention due to its potential applications in e.g., classical and quantum sensing. However, the opposite edge of the system, featured by the exponentially suppressed wavefunctions, remains largely unexplored. Leveraging this phenomenon, we introduce a non-Hermitian cooling mechanism, which is fundamentally distinct from traditional refrigeration or laser cooling techniques. Notably, non-Hermiticity will not amplify thermal excitations, but rather redistribute them. Hence, thermal excitations can be cooled down at one edge of the system, and the cooling effect can be exponentially enhanced by the number of auxiliary modes, albeit with a lower bound that depends on the dissipative interaction with the environment. Non-Hermitian cooling does not rely on intricate properties such as exceptional points or non-trivial topology, and it can apply to a wide range of Bosonic modes such as photons, phonons, magnons, etc.Comment: 12 pages, 4 figure