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Search Results: 1 - 10 of 150197 matches for " LI Ying-chun "
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Absence of influenza vaccination among high-risk older adults in Taiwan
Ying-Chun Li
BMC Public Health , 2010, DOI: 10.1186/1471-2458-10-603
Abstract: Retrospectively reviewing a nationally representative random sample of medical claims from Taiwan's National Health Insurance Research Database during the period 2004 - 2006, we first identified patients sixty-five years or older who had visited physicians. Each patient was assigned a proxy for health status, the Charlson Comorbidity Index (CCI) score. An older claimant was defined has having "absence of a vaccination" when he or she had visited a physician during an influenza season but did not receive an influenza vaccination. Multivariate logistic regression was performed to estimate how likely it would be for older adults with various CCI scores to miss a vaccination.Out of 200,000 randomly selected claims, 20,923 older adults were included in our final analysis. We found older adults with higher CCIs to be more likely to have an absence of vaccination (p < 0.01). Our multivariate logistic regression results revealed CCI to be the greatest predictor of absence of vaccination, after controlling for individual factors and medical setting. Older adults with CCI scores three or higher were nearly five times more likely to miss a vaccination than those with a CCI of zero [OR: 4.93 (95%CI, 4.47-5.42)]. Those with CCIs of one and two were 2.53 and 3.92 times more likely to miss vaccination than those with a CCI of zero [OR 2.53 (95%CI, 2.26-2.84) and OR 3.92 (95%CI, 3.51-4.38), respectively].The greater the number of certain comorbid conditions, the greater the likelihood a flu vaccination will be missed. Physicians would be well advised to not let the presenting problems of older patients distract from other possible health problems that might also need attention, in this case influenza vaccinations.Influenza is a common respiratory disease affecting large proportions of many populations annually [1,2]. There is increased likelihood of serious complications or death from influenza infection in older patients with co-existing chronic illnesses [1,3,4] and it is, theref
Study on the Temperature of the Bridge Wire in the Initiator Used in Nuclear Explosion Valve  [PDF]
Lan Shi, An-Min Yang, Ying-Chun Zhang, Yuan-He Wang, Zhanying Li
American Journal of Analytical Chemistry (AJAC) , 2016, DOI: 10.4236/ajac.2016.712077
Abstract: This paper established the mathematical model of bridge wire temperature rise under direct current condition and gave the solution. It computed bridge wire temperature by using the thermal-electric coupling method provided by ANSYS-Workbench finite element analysis software. In the end, the temperature bridge wire applied to different electric current was measured by the infrared thermal imaging temperature measurement method. The result shows that the ANSYS simulation results are in agreement with the theoretical calculation and the experimental results. It is feasible to compute bridge wire temperature of initiator by using ANSYS-Workbench software, and it is an important method to analyze complex structure of pyrotechnics.
Synthesis and Electrochemical Properties of Porous SnO2 Agglomerates
LI Fang, ZHU Ying-Chun
无机材料学报 , 2012, DOI: 10.3724/sp.j.1077.2011.11557
Abstract: Porous SnO2 agglomerates with crystalline pore walls were obtained by employing CTAB and trimethyl phosphate (TMP) as molecular co―templates via hydrothermal method. Tin (IV) chloride dihydrate was used as the inorganic precursor at high molar ratio of surfactant/Sn4+. The resulting samples were characterized by SEM, (HR)TEM, XRD, thermal analysis and nitrogen adsorption―desorption to examine the structural and morphological characters. The results indicate that the addition of small co―template TMP can facilitate the assembling of tin ions near the CTAB micelles, which can increase the specific surface area and improve the thermal stability of the resulted sample. The electrochemical properties of porous SnO2 as the anode materials of lithium―ion battery (LIB) are further investigated by using galvanostatic method. The porous SnO2 calcined at 300 displays a much higher reversible capacity of 962.4 mAh/g, which can be ascribed to the incomplete combustion of the organic materials and the unique nanostructure itself. The addition of bigger counter ions with large electric negativity might give an alternative approach to improve the properties of porous metal oxides synthesized by soft template method.
Threat-responsiveness and the decision to obtain free influenza vaccinations among the older adults in Taiwan
Ying-Chun Li, Chi-Mei Liu
BMC Public Health , 2009, DOI: 10.1186/1471-2458-9-275
Abstract: Using national representative health insurance medical claims from the National Health Insurance Research Database between 2002 and 2004, we investigated the role of threat-responsiveness, represented by prior vaccinations and prior physician visits for flu-like respiratory conditions, in the decisions of older adults to obtain vaccinations in Taiwan.Among the sample of 23,023 older adults, the overall yearly vaccination rates in this study were 38.6%, 44.3% and 39.3% for 2002, 2003, and 2004, respectively. Adjusting for covariates of individual and health care facility characteristics, the multivariate logistic regression revealed that older adults who had had prior vaccinations were ten times more likely to be vaccinated during the following influenza season than those who had not (OR = 10.22, 95%CI: 9.82–10.64). The greater the frequency of prior physician visits for flu-like respiratory conditions, the greater the likelihood that one would decide to be vaccinated. Visits during prior interim (non-epidemic) season exerted a stronger positive influence than prior influenza season on this likelihood (OR = 1.59, 95% CI: 1.46–1.73 vs. OR = 1.11 95% CI: 1.01–1.22, respectively).Threat-responsiveness, or perceived risk, greatly influences influenza vaccination rates among the older adults in Taiwan. These findings can be used to help design public health campaigns to increase the influenza vaccination rate in this vulnerable group of citizens. Particularly, older adults who never had influenza vaccinations can be identified, educated, and encouraged to participate.Influenza poses a significant threat to the health of older adults and presents a critical disease burden to health care delivery systems around the world [1-3]. While many studies and government health systems consider vaccination to be a cost-effective means of preventing influenza in older adult populations [4-7], vaccination rates do not reach the number of people targeted to receive them in many countrie
The Insect Fascicle Morphology Research and Bionic Needle Pierced Mechanical Mechanism Analysis
Xin QI,Ying-chun QI,Yan LI,Qian CONG
Advances in Natural Science , 2010, DOI: 10.3968/940
Abstract: In this paper, mosquito and cicadas two kinds of insects fascicle were studied, and observed the fascicle surface morphology and distribution through scanning electron microscopy, discussed the height of the six parameters of sawtooth and analyzed quantitatively, compared the two types of fascicle in micro-structure size, and shape, the experiment results show that there are obviously different among the two mouth fascicle morphological structure. Triangular sawtooth are all clearly visible in the two kinds of insect fascicle, in which the mosquito has the small microstructure, and the cicada has the larger one; microstructure of mosquitoes tilt to the rear part of the fascicle, while the microstructure of cicada is symmetric on bottom corner. Based on non-smooth surface structure of fascicle obvious principles of drag reduction effect, the model of drag reduction bionic syringe is proposed, Designed a bionic drag painless needles, and simulated needle piercing power is also measured. Bionic needle surface microstructure can help reduce the needle to decrease the contact area, form rolling, friction, and thus reduce the resistance to needle piercing. Bionic needle has been proved that its puncture resistance is less than smooth one consequently has significant drag reduction effects. Keywords: Insects fascicle; surface morphology; bionic needles; drag reduction
Amperometric Sensor Used for Determination of Thiocyanate with a Silver Nanoparticles Modified Electrode
Guang-Feng Wang,Mao-Guo Li,Ying-Chun Gao,Bin Fang
Sensors , 2004, DOI: 10.3390/s40900147
Abstract: A novel electrode modified with silver nanoparticles was fabricated. It is found that the reducibility of silver nanoparticles is higher than for bulk silver by comparing a silver nanoparticles modified electrode with a silver micro-disk electrode. When SCN- was added, a new oxidation peak occurred and the anodic peak current of silver nanoparticles decreased. The new anodic peak current is proportional to the thiocyanate concentration in the range of 5.0×10-7~4.0×10-4 mol/L in pH 6.0 NaH2PO4-Na2HPO4 buffer solutions (PBS). The detection limit (S/N=3) is 4×10-8 mol/L. This method has been applied to the determination of saliva (smoker and non-smoker).
Correlation between chemosensitivity to anticancerdrugs and telomerase reverse transcriptase mRNAexpression in gastric cancer
Lin Wang, Pei-Feng Li, Ming Geng, Yong-Cheng Cao, Ying-Chun Yin
Diagnostic Pathology , 2013, DOI: 10.1186/1746-1596-8-33
Abstract: The GC cells which were collected from 68 patients with primary GC were primary cultured. The chemosensitivity of GC cells to anticancer drugs was evaluated successfully using the MTT assay for 60 cases of GC cells, and the hTERT mRNA expression was examined in 60 cases of GC tissues and corresponding normal gastric mucosa and 6 cases of chronic superficial gastritis mucosa by in situ hybridization.Taxol, Cisplatin and 5-Fluorouracil were in general more effective than Adriamycin and Mitomycin for GC cells, and the chemosensitivity to anticancer drugs was associated with tumor histological types and a worse tumor grade. Compared to normal gastric mucosa tissues, hTERT mRNA expression was significantly increased in GC (P<0.05), which was related with a worse differentiation and drug-resistance to 5-Fluorouracil or Adriamycin in GC.These data demonstrate for the first time that examinations of hTERT mRNA expression as an important factor could be used to select the chemotherapeutic drugs for GC patients. Virtual slides The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1793217009875483
Water parameters of desert xeric shrubs in west Erdos region.
西鄂尔多斯地区强旱生小灌木的水分参数

LI Xiao,WANG Ying-chun,ZHENG Rong,
李骁
,王迎春,征荣

应用生态学报 , 2007,
Abstract: By using PV technique, this paper studied the turgor pressure (psi P), cell elastic modulus (epsilon), and relative cell volume (RCV) of super xerophytes Potaninia mongolica, Reaumuria soongorica, Tetraena mongolica and Zygophyllum xanthoxylon in west Alashan, with the relationships among the parameters analyzed. The results showed that R. soongorica had the strongest ability to maintain maximum turgor pressure (a = 2.4593). The four plants maintained their turgor pressure by different ways, i.e., P. mongolica maintained it by elastic adjustment (epsilon max = 8.4005 MPa), R. soongorica by osmotic adjustment (psi pi100 = -3.1302 MPa; psi0 = -3.5074 MPa), T. mongolica by both osmotic and elastic adjustment, and Z. xanthoxylon by osmotic adjustment, which had weak adjustment ability. The cell wall of P. mongolica was soft and highly elastic, benefiting to the water absorption by root and stem and to the fast water transmission. T. mongolica also had relatively soft and high elastic cell wall, and its psi P, and epsilon changed slowly with decreasing RCV, suggesting that this plant had strong ability of holding water and resisting dehydration.
Climate division of planting bamboo based on GIS in the Jinggang mountain area
GIS支持下的井冈山区毛竹种植气候区划

LI Ying-Chun,ZHANG Jian-Ping,
李迎春
,张建萍

中国生态农业学报 , 2002,
Abstract: 根据毛竹正常生长发育所需的气候条件,利用地理信息系统(GIS)对井冈山区毛竹进行气候分区,在此基础上叠加由遥感监测的井冈山区毛竹实际分布信息,并就区划结果提出相应的建议。
WATER CHARACTERISTICS OF THE XEROPHYTIC SHRUBLET, POTANINIA MONGOLICA, DURING FISSURATE GROWTH
强旱生小灌木绵刺劈裂生长过程中的水分特征

WANG Ying-Chun,LI Xiao,
王迎春
,李骁

植物生态学报 , 2007,
Abstract: 绵刺(Potaninia mongolica)是西鄂尔多斯一东阿拉善地区特有的单种属残遗植物.选取内蒙古磴口县境内具有绵刺群落的草原化荒漠区为研究样区,于2002~2003年每年8月1~5日采集未劈裂、正在劈裂和已劈裂植株,运用PV技术对不同劈裂生长状态绵刺的多种水分关系参数(φs^sat、φs^tlp、ROWC^tlp、RWC^tlp、△φ、ε^max等)进行了测定,从绵刺保持膨压的能力和途径两方面进行了深入探讨;同时结合同一项目研究中绵刺劈裂生长过程中抗氧化酶系统和内源激素方面的研究成果,综合分析并探讨了绵刺劈裂生长的发生机理及其环境适应性.结果表明:1)未劈裂蜒绵刺主要通过增加细胞内溶质(如脯氨酸),减少细胞内的水分丧失来进行渗透调节,从而在干旱胁迫下能够维持正常的膨压.2)已劈裂绵刺通过渗透调节和高的组织弹性两条途径来共同保持膨压,以抵抗不良的生存环境;同时对环境水分胁迫具有较高的敏感性.3)3种状态绵刺保持膨压的能力由强到弱依次为:未劈裂绵刺、正在劈裂绵刺、已劈裂绵刺.4)劈裂的发生导致绵刺保持膨压能力的降低,同时耐旱方式和途径发生了变化.
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