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Abayomi Oloruntoba Dorcas A Adegbite 《The Journal of Agricultural Education and Extension》2013,19(4):273-283
Abstract University outreach is an educational and research-based information source enabling farmers to make decisions that improve the quality of their lives. This paper explores how collaborative efforts between the university and farmers have directly impacted in albeit Striga (‘noxious witch weed’) ravaged maize farms in rainforest farming systems in southwest Nigeria. Data were collected using pre-tested instruments from cross-section of 280 participating and non-participating farmers. Logistic regression results indicated that certain coefficient estimates such as gender, regularity of extension contact, membership of farmers’ group, female adult aged 16 and above, assistance in the provision of tractor-hiring services and improved crop yields were found to be statistically significant at p < 0.05. Furthermore, findings from sample statistics were reflections of peasantry as majority of the farmers had small mean farm size, large household size and low annual income from sales of maize crop. The major conclusion that could be drawn from the study is that the provision of extension by the university coupled with other factors have had significant positive influence on decision to adopt introduced cultural practices with attendant improvement on the well-being of participating farmers. 相似文献
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Liu Y Chen L Peng SY Chen ZX Hoang-Vu C 《Journal of Zhejiang University. Science. B》2005,6(9):913-918
Objectives: To explore the mechanism of development and aggressiveness in gastric carcinomas by investigating the expression and role of CD97 and its cellular ligand CD55 in gastric carcinomas. Methods: Tumor and corresponding normal mucosal tissue, collected from 39 gastric carcinoma patients, were examined by immunohistochemistry and RT-PCR for the expression of CD97 and CD55. Results: CD97stalk was strongly stained on scattered tumor cells or small tumor cell clusters at the invasion front of gastric carcinomas. The expression of CD97stalk was frequently observed in tumors of stage Ⅰ and T1 gastric carcinoma patients. The expression of CD97stalk between Stage Ⅰ and Stage Ⅱ, Ⅲ, Ⅳ specimens showed significant difference (P＜0.05), between T1 and T2, T3, T4 specimens also showed significant difference (P＜0.05). Specimens with tumor invasion depth limited in mucosa of T 1 specimens showed higher positive CD55 expression than specimens with the same tumor invasion depth in T2, T3, T4 specimens, the expression of CD55 between T1 and T2, T3, T4 specimens was significantly different (P＜0.05).There was strong correlation between the distribution patterns of CD97stalk and CD55 on tumor tissues (r=0.73, P＜0.05). Signet ring cell carcinomas frequently contained strong CD97stalk and CD55-staining. Conclusions: Our results suggest that CD97stalk is probably involved in the growth, invasion and aggressiveness of gastric carcinomas by binding its cellular ligand CD55. CD97stalk and CD55 could be useful as molecular markers for prognosis and therapy of gastric carcinoma patients. 相似文献
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蔺宏 《淮南职业技术学院学报》2004,4(1):80-82
利用微型计算机测量控制系统中GMS97C2051A／D、D／A数椐转换技术，以单片机作为主芯片，采用TLC254312位串行A／D转换器，应用开关电容逐次逼进技术完成A／D转换过程，建立12位A／D转换器串行数据采集／传输模块系统。单片机采集的数据通过串口径MAX3232转换成R5232电平向上位机／传输，并给出了硬件系统原理图和源程序。 相似文献
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在随着2000国家大地坐标系在全国不断推广与应用,将ITRF2000框架下的坐标转换到CGCS2000框架时,需先转换到ITRF1997框架下。采用布尔沙——沃尔夫模型对基于不同基准的两框架之间进行坐标转换,设计七参数求解程序,并通过实例分析验证其准确性和可靠性。 相似文献
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张生亮 《山西财经大学学报(高等教育版)》2001,(2):46-46,48
《计算机应用基础》是大学许多专业都开设的一门基础课程，其教学质量的好环直接影响到大学生的计算机使用水平。计算机的教学首先应该计算机化，而电子课件的制作和使用是其中最重要的一环。 相似文献
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何志明 《重庆职业技术学院学报》2008,17(3):100-102
以GM897C2051单片机为核心,采用TLC254312位串行A／D转换器构成采样模块．采样数据由单片机串口经电平转换器MAX3232进行电平转换后送到上位机的串口COM1或COM2,形成串行数据采集及传榆方式,具有一定的实用价值。 相似文献
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科技期刊自主全文上网的可操作性研究 总被引：5，自引：1，他引：4
陶勖恒 《中国科技期刊研究》2000,11(2):99-101
介绍在Word97下,表格,插图,公式经HTML转换后常遇的缺陷及其纠正措施：在Word2000下,Web页的编辑功能。并分析了目前编辑流程的现状,提出改进建议,从而说明科技期刊自主全文上网已可操作。 相似文献
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本文对使用PowerPoint 97制作高等代数教学课件以及使用计算机大屏幕投影教学进行了有益的探讨 相似文献
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多用途混凝土抗氯离子渗透性测定仪的研制及应用 总被引：1，自引：0，他引：1
该多用途混凝土抗氯离子渗透性测定仪基于计算机系统的USB总线和虚拟仪器的方法研制，可依照ASTMC1202．97规范和依据Nemst-Einstein方程原理建立的NEL方法，分别通过测定在规定时间内通过混凝土的总电量和混凝土的氯离子扩散系数来快速评定混凝土的抗氯离子渗透性。试验结果表明：该设备可依照相应的规范和方法，精确地完成对混凝土抗氯离子渗透性的评价，同时该设备还具有安全性高，可移植性好和扩展能力强的特点。 相似文献
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