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608 results on '"Li, Ri"'

201. [Analysis of risk factors for prognosis of frontal lobe epilepsy]

Author

Hua, Lin, Li-wen, Wu, Yan, Chen, Qiang, Lu, Bing-wei, Peng, and Li-ri, Jin

Subjects
Male, Adolescent, Epilepsy, Frontal Lobe, Infant, Electroencephalography, Prognosis, Logistic Models, Risk Factors, Child, Preschool, Humans, Female, Child, Follow-Up Studies, Retrospective Studies
Abstract

To analyze the risk factors for the prognosis of frontal lobe epilepsy in order to predict the refractory frontal lobe epilepsy early, so as to provide theoretic basis for rational therapy early.Forty-seven patients with medically refractory frontal lobe epilepsy and 92 patients with medically controllable epilepsy, totally 139 patients, underwent epidemiological savery, cranial CT or MRI, and video-electroencephalography (VEEG). Single factor analysis and Logistic stepwise regression analysis were done to analyze the relationship between the influential factors and the prognosis of disease.Single factor analysis showed that the factors including earlier onset age, longer duration before taking reasonable medicine, more frequent seizure (1 time/day), asymmetric tonic seizures, seizures with hypermotor automatism, secondary generally tonic-clonic seizures, and a past history of taking medicine, exerted adverse effects on the prognosis of frontal lobe epilepsy (all P0.05). Logistic stepwise regression analysis screened out such factors including duration before taking reasonable medicine (OR = 1.384, 95% CI 1.133 - 1.689) and seizure frequency (OR = 6.512, 95% CI 1.637 - 25.911) as independent predictors for the prognosis of frontal lobe epilepsy.Long duration before taking reasonable medicine and frequent seizure onset are important risk factors for refractory frontal lobe epilepsy. It is possible to improve the prognosis of frontal lobe epilepsy by making a definite diagnosis and beginning rational therapy early.

Published
2007

202. Mixing hydrogen into natural gas distribution pipeline system through Tee junctions.

Author

Khabbazi, Arash J., Zabihi, Mojtaba, Li, Ri, Hill, Matthew, Chou, Vincent, and Quinn, John

Subjects
*GAS distribution, *NATURAL gas pipelines, *REAL gases, *EQUATIONS of state, *HYDROGEN, *IDEAL gases
Abstract

Hydrogen injection into natural gas distribution pipeline system through Tee junctions is numerically studied, by considering both ideal and Soave–Redlich–Kwong real gas models. The mixing homogeneity length is quantified for various side pipe sizes and perpendicular configurations for distribution-pressure and intermediate-pressure pipelines. The buoyant nature of hydrogen once blended into natural gas pipelines introduces a challenge as it tends to stratify and become trapped near the top wall. Accordingly, a greater side flow momentum leads to a shorter mixing homogeneity length. This reduces up to three to five times particularly when it penetrates deeply into the main flow without getting trapped from the beginning. Consequently, vertical bottom-side injection yields a mixing homogeneity length that is roughly four times shorter than horizontal and five times shorter than vertical top-side injection. Furthermore, employing a real gas model is critical once the pressure rises to intermediate pressures, resulting in a greater homogeneity length. [Display omitted] • Modeling hydrogen injection into natural gas distribution pipeline via Tee junctions. • Integration of Soave–Redlich–Kwong equation of state with van der Waals mixing rules. • Quantifying the mixing homogeneity length of hydrogen and natural gas in pipelines. • Impact of changing the side pipe size and its perpendicular orientation on mixing. • Comparing the ideal and real gas equation of state at intermediate-pressure lines. [ABSTRACT FROM AUTHOR]

Published
2024
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203. [Characteristics of clinical manifestations and EEG of Lennox-Gastaut syndrome]

Author

Lian-kun, Ren, Li-wen, Wu, Li-ri, Jin, Wei, Gao, and Xiao-qiu, Shao

Subjects
Male, Child, Preschool, Intellectual Disability, Humans, Infant, Electroencephalography, Epilepsies, Myoclonic, Female, Syndrome, Child, Tomography, X-Ray Computed, Spasms, Infantile, Follow-Up Studies
Abstract

Lennox-Gastaut syndrome (LGS) is one of the most severe and refractory form of childhood epilepsy. The purpose of this study was to investigate the clinical and EEG characteristics of patients with LGS.Sixty-two patients with LGS, including 37 males and 25 females, were followed-up regularly per three months or per six months, therapy was adjusted according to the changes in seizures and EEG, and the clinical data were analyzed in detail.The onset occurred between the age of 8 months and 12 years, with the peak at 1-4 years of age, accounting for 61%; a late onset which occurred after 8 years of age, was unusual. Furthermore, one patient who developed LGS at the age of 13 years and remained to have all the features of seizures and EEG at 35 years of age was identified as adult's LGS. Forty-three patients were classified as symptomatic, perinatal events were the predominant factors in this group. The others were cryptogenic. It was noted that 11 cases had a history of West syndrome. A transformation process from West syndrome to LGS was observed in another 7 cases. Every patient had two or more seizure types during the course of the disease; tonic seizure, atypical absence seizure, head drop or sudden falls were the characteristic types. The degree of mental deficit was variable from slight to profound deterioration, but mental and behavioral disturbances existed in every case as a rule. In all cases electroencephalogram (EEG) background was abnormal and consisted of diffuse slow spike-and-waves (1-1.5CPS), predominant in frontal and temporal regions. Twenty-four cases had the polyspike-wave. Bursts of fast rhythms (10-14CPS) were observed in 29 patients during sleep. The choice of antiepileptic drugs (AEDs) was based on the seizure types; routinely, 2 or more kinds of AEDs were used in combination, the classic drugs, valproate and clonazepam were firstly recommended; the other drugs, such as lamotrigine and topiramate that are used as add-on therapy were further consideration. Although the total effect was not satisfactory, the severity and frequency of seizures in almost all cases had lessened to some extent.LGS shows diverse manifestations; comprehensive diagnosis is crucial, active and efficacious treatment can improve the mental and behavioral development and prognosis as a whole.

Published
2004

219. Prevalence of metabolic syndrome in Mainland China: a meta-analysis of published studies.

Author

Ri Li, Wenchen Li, Zhijun Lun, Huiping Zhang, Zhi Sun, Joseph Sam Kanu, Shuang Qiu, Yi Cheng, Yawen Liu, Li, Ri, Li, Wenchen, Lun, Zhijun, Zhang, Huiping, Sun, Zhi, Kanu, Joseph Sam, Qiu, Shuang, Cheng, Yi, and Liu, Yawen

Subjects
METABOLIC syndrome, PSYCHOMETRICS, META-analysis, INSULIN resistance, HETEROGENEITY
Abstract

Background: Metabolic syndrome (MS) comprises a set of conditions that are risk factors for cardiovascular diseases and diabetes. Numerous epidemiological studies on MS have been conducted, but there has not been a systematic analysis of the prevalence of MS in the Chinese population. Therefore, the aim of this study was to estimate the pooled prevalence of MS among subjects in Mainland China.Methods: We performed a systematic review by searching both English and Chinese literature databases. Random or fixed effects models were used to summarize the prevalence of MS according to statistical tests for heterogeneity. Subgroup, sensitivity, and meta-regression analyses were performed to address heterogeneity. Publication bias was evaluated using Egger's test.Results: Thirty-five papers were included in the meta-analysis, with a total population of 226,653 Chinese subjects. Among subjects aged 15 years and older, the pooled prevalence was 24.5% (95% CI: 22.0-26.9%). By sex, the prevalences were 19.2% (95% CI: 16.9-21.6%) in males and 27.0% (95% CI: 23.5-30.5%) in females. The pooled prevalence of MS increased with age (15-39 years: 13.9%; 40-59 years: 26.4%; and 60 years: 32.4%). Individuals living in urban areas (24.9%, 95% CI: 18.5-31.3%) were more likely to suffer from MS than those living in rural areas (19.2%, 95% CI: 14.8-23.7%). Hypertension was the most prevalent component of MS in males (52.8%), while the most prevalent component of MS for females was central obesity (46.1%).Conclusions: Our systematic review suggested a high prevalence of MS among subjects in Mainland China, indicating that MS is a serious public health problem. Therefore, more attention should be paid to the prevention and control of MS. [ABSTRACT FROM AUTHOR]

Published
2016
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228. Dynamics of Ice Nucleation on Water Repellent Surfaces

Author

Alizadeh, Azar, primary, Yamada, Masako, additional, Li, Ri, additional, Shang, Wen, additional, Otta, Shourya, additional, Zhong, Sheng, additional, Ge, Liehui, additional, Dhinojwala, Ali, additional, Conway, Ken R., additional, Bahadur, Vaibhav, additional, Vinciquerra, A. Joseph, additional, Stephens, Brian, additional, and Blohm, Margaret L., additional

Published
2012
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