Publications by authors named "Zheng Dai"
Signal Processing for Novel Noise Radar Based on de-chirp and Delay Matching.
Sensors (Basel)
November 2024
Modern radar technology requires high-quality signals and detection performance. However, traditional frequency-modulated continuous wave (FMCW) radar often has poor anti-jamming capabilities, and the high sampling rates associated with large time-bandwidth product signals can lead to increased system hardware costs and reduced data processing efficiency. This paper constructed a composite radar waveform based on noise frequency modulation (NFM) and linear frequency modulation (LFM) signals, enhancing the signal's complexity and anti-jamming capability.
View Article and Find Full Text PDFIschemic stroke poses a significant global health risk. Currently, recanalization of blood flow through surgery or medication is the only effective means to control ischemia-reperfusion injury. This study aims to explore the role and molecular mechanism of OGT in regulating neuronal injury and motor deficits following a stroke.
View Article and Find Full Text PDFIn recent years, one-bit quantization has attracted widespread attention in the field of direction-of-arrival (DOA) estimation as a low-cost and low-power solution. Many researchers have proposed various estimation algorithms for one-bit DOA estimation, among which atomic norm minimization algorithms exhibit particularly attractive performance as gridless estimation algorithms. However, current one-bit DOA algorithms with atomic norm minimization typically rely on approximating the trace function, which is not the optimal approximation and introduces errors, along with resolution limitations.
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- The lattice Boltzmann method (LBM) is a technique used to study how energy storage materials change from liquid to solid, especially looking at the heat involved in this change.
- Sometimes, this method doesn’t work perfectly when mixed materials are involved because their properties get mixed up during calculations.
- To fix this, the paper introduces a new model that keeps track of different materials separately and checks how heat moves between them, and it’s tested with water turning into ice to see if it matches real-life results, which it mostly does!
Article Synopsis
- This study looked at how many men and women die from overdoses in West Virginia and how different drugs, like alcohol and fentanyl, affect those numbers.
- Researchers found that more men died from overdoses when alcohol was involved, and women have been increasingly affected by alcohol-related deaths.
- The study also noted that men had higher levels of fentanyl in their systems compared to women, which is important to understand to help prevent these deaths.
Demographic, co-intoxicants and other characteristics of citalopram-involved overdose deaths.
Forensic Sci Med Pathol
September 2024
Article Synopsis
- Citalopram, an SSRI, was frequently involved in West Virginia drug-related deaths from 2005 to 2021, making up 4.5% of all cases analyzed, with a majority classified as unintentional.
- Males and females had a notable difference in citalopram-related deaths, with a male to female ratio of 0.9:1, which is lower than the ratio in non-SSRI deaths (2.3:1).
- Over two-thirds of citalopram deaths involved four or more substances, often including opioids like oxycodone, highlighting the complexity of determining citalopram's role in overdose fatalities due to the presence of multiple drugs.
Article Synopsis
- Scientists are trying to find a new way to detect prostate cancer early by studying changes in a gene located on the Y chromosome.
- They discovered that the gene's activity is lower in prostate cancer, and this decrease might be linked to its methylation, which is like adding a label that can turn off the gene.
- This methylation could be a better tool for early diagnosis of prostate cancer compared to other tests currently used, making it an important discovery.
Article Synopsis
- This study looks at patients who had a specific type of stroke and received a treatment called endovascular thrombectomy to see how well it works and why some people got worse afterwards.
- Out of 477 patients, 86 experienced a change for the worse, which is called unexplained early neurological deterioration (UnEND).
- The study found that high blood sugar levels, the severity of the stroke at the start, and small brain bleeds without symptoms were linked to this worsening condition, suggesting ways to improve treatment outcomes.
Article Synopsis
- Ischemic stroke causes a lot of sickness and disability, and it's hard to fully understand and treat it.
- This study looks at how melatonin, a natural sleep aid, might help reduce brain damage caused by a type of cell death called ferroptosis in mice and cells.
- The researchers found that melatonin not only reduces harmful iron levels in cells but also helps protect the brain by affecting specific proteins that deal with iron, which could be important for future treatments.
Article Synopsis
- Scientists studied how gut bacteria might affect strokes caused by blocked blood vessels.
- They looked at 63 patients with a type of stroke, 64 patients with a different brain problem, and 36 healthy people.
- They found certain gut bacteria types that changed a lot in stroke patients and could help doctors understand how bad the stroke was and how patients might recover.
Symmetry breaking in quantum materials is of great importance and can lead to non-reciprocal charge transport. Topological insulators provide a unique platform to study non-reciprocal charge transport due to their surface states, especially quantum Hall states under an external magnetic field. Here we report the observation of non-reciprocal charge transport mediated by quantum Hall states in devices composed of the intrinsic topological insulator Sn-BiSbTeS, which is attributed to asymmetric scattering between quantum Hall states and Dirac surface states.
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- Ovarian function suppression (OFS) treatment helps breast cancer patients but also causes a lot of physical and emotional side effects, which can affect their recovery.
- Many patients struggle to manage these side effects on their own due to a lack of knowledge or motivation.
- A study is being done to test a guided self-help program that teaches patients how to cope with their symptoms better and improve their overall treatment experience.
Article Synopsis
- Traditional methods to diagnose serious prostate cancer involve painful biopsies, but new techniques using MRI and blood tests could be less painful and just as effective.!
- Researchers studied 54 patients and used information from their MRIs, blood samples, and clinical data to create a model that helps predict the presence of prostate cancer better than current methods.!
- The best combination model showed really high accuracy in diagnosing prostate cancer, meaning it could help doctors make better decisions without needing invasive procedures. !
Article Synopsis
- Scientists studied how well the MiniMed 780G worked for people in Australia with type 1 diabetes compared to the MiniMed 670/770G over a couple of years.
- They found that those using the MiniMed 780G had better control over their blood sugar levels, meaning they spent more time in the right range and less time with high blood sugar.
- After switching from 670/770G to 780G, users improved their blood sugar control even more, and this improvement lasted for a year.
Article Synopsis
- Supercritical water oxidation (SCWO) is a new method to treat organic waste safely and turn it into harmless substances.
- This process can break down waste into small, eco-friendly molecules when certain conditions like high temperature and pressure are used.
- The paper also talks about advanced techniques to improve SCWO, like adding extra oxygen or using special methods to speed up the breakdown of tough organic materials.
Reducing Diabetes Burden in Medtronic's Automated Insulin Delivery Systems.
Diabetes Technol Ther
March 2024
Article Synopsis
- The MiniMed™ 780G is an advanced system that helps people with diabetes manage their blood sugar levels better than the older 670G and 770G systems.
- In studies, it was found that using the 780G led to fewer daily fingerstick tests and less interference with the system while also keeping blood sugar levels more stable.
- Kids using the 780G had a noticeable drop in their average glucose levels, while adults saw no change, but both groups enjoyed less hassle with their diabetes management.
Background And Aims: As sepsis progresses, immune cell apoptosis plays regulatory roles in the pathogenesis of immunosuppression and organ failure. We previously reported that adenosine deaminases acting on RNA-1 (ADAR1) reduced intestinal and splenic inflammatory damage during sepsis. However, the roles and mechanism of ADAR1 in sepsis-induced liver injury remain unclear.
View Article and Find Full Text PDFBackground: Stroke is a major medical problem, and novel therapeutic targets are urgently needed. This study investigates the protective role and potential mechanisms of the N6-methyladenosine (m6A) RNA methyltransferase METTL3 against cerebral injury resulting from insufficient cerebral blood flow.
Methods: In this study, we constructed mouse MCAO models and HT-22 cell OGD/R models to mimic ischemic stroke-induced brain injury and neuronal damage.
The use of low-cost and effective cocatalyst is a potential strategy to optimize the effectiveness of photoelectrochemical (PEC) water splitting. In this study, tungsten phosphide (WP) is introduced as a remarkably active cocatalyst to enhance the PEC efficiency of a BiWO photoanode. The onset potential of BiWO/WP demonstrates a negative shift, while the photocurrent density demonstrates a significant 5.
View Article and Find Full Text PDFPSCK9 inhibitors reduced early recurrent stroke in patients with symptomatic intracranial atherosclerotic stenosis.
J Neurol Neurosurg Psychiatry
May 2024
Article Synopsis
- Researchers studied if a medicine called PCSK9 inhibitors could help patients who had strokes due to a problem in their brain's blood vessels.
- They found that patients taking PCSK9 inhibitors had lower bad cholesterol levels and fewer chances of having another stroke within a month.
- The results suggest that PCSK9 inhibitors might be a good addition to the treatment for these patients to prevent early strokes.
Article Synopsis
- In 2010, a new version of OxyContin was created to reduce misuse, and this change affected how people used prescription drugs.
- The study compared the impact of this new OxyContin to the decline in other prescription opioids like oxycodone and hydrocodone in West Virginia.
- Results showed that the decrease in prescription opioids, not just the new OxyContin, played a big role in changes to overdose rates in the state.
Article Synopsis
- Buprenorphine is crucial for treating opioid use disorder and may help lower fatal overdose risks from fentanyl, but its impact has not been fully assessed.
- A study analyzed data from 3036 fentanyl overdose victims in West Virginia to understand how buprenorphine presence influenced fentanyl levels in their system, accounting for other substances and health conditions.
- Results indicated that fentanyl concentrations were significantly higher when buprenorphine was present, and other factors like obesity and alcohol use were linked to lower concentrations, whereas marijuana and substance use history correlated with higher concentrations.
Non-orthogonal multiple access (NOMA) in a radio over fiber (RoF) link based on optical-domain power allocation is proposed and demonstrated. The NOMA is implemented at the RoF transmitter where two spectrum-overlapped microwave vector signals with an identical power level are modulated on an optical carrier to generate two orthogonally polarized optical signals. By passing the optical signals through a polarization controller (PC) and a polarizer, the power levels of the two optical signals are controlled to achieve optical power allocation (OPA).
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