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用镭同位素寻找古河道中的铀

世界核地质科学 1986年第4期 30-30,17页

作者： B.L.dickson 舒孝敬中南地勘局230研究所

分析了许多地下水样中的溶解铀和四种天然产出的镭同位素:226Ra(233U衰变系,t 1/2=1,600a)、228Ra和224Ra(232Th衰变系,t 1/2=5.75 a和3.8 d)、223Ra(235U衰变系,t 1/2=11d)。这些样品有的采自铀矿床附近,其余采自非矿化区。对从刚采集... 详细信息

分析了许多地下水样中的溶解铀和四种天然产出的镭同位素:226Ra(233U衰变系,t 1/2=1,600a)、228Ra和224Ra(232Th衰变系,t 1/2=5.75 a和3.8 d)、223Ra(235U衰变系,t 1/2=11d)。这些样品有的采自铀矿床附近,其余采自非矿化区。对从刚采集的水样中提取的镭同位素226Ra、224Ra和223Ra,用α能谱仪进行了测量。对稍后的223Ra则通过测定212Po的

关键词：镭同位素古河道水样 Ra 地下水澳大利亚放射性强度大洋洲放射性活度铀矿化

慈善营销何以成功?——从消费者行为视角探讨慈善营销效果、影响因素及其作用机制

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南大商学评论 2021年第2期18卷 167-199页

作者：桂俊杰 dickson Tok 初星宇陈曦南京大学商学院营销与电子商务系

慈善营销是被品牌和公司广泛运用的营销策略之一,亦是市场营销研究领域热门研究主题之一。慈善营销研究主要探讨慈善活动与营销活动结合会如何影响消费者决策与行为。本文旨在对过去三十余年(1988~2021年)消费者行为领域慈善营销研究进... 详细信息

慈善营销是被品牌和公司广泛运用的营销策略之一,亦是市场营销研究领域热门研究主题之一。慈善营销研究主要探讨慈善活动与营销活动结合会如何影响消费者决策与行为。本文旨在对过去三十余年(1988~2021年)消费者行为领域慈善营销研究进行系统回顾。首先对慈善营销与其相近概念进行辨析;其次总结慈善营销对情绪、态度及行为三方面的主要营销效果,并从公司及品牌、慈善、产品、消费者、营销传播五个方面全面梳理影响慈善营销效果的主要因素,进而归纳出情感、动机及认知三方面的作用机制;最后提出慈善营销未来研究方向,以期促进学术界对慈善营销的深入研究及业界慈善营销的实践发展。

关键词：慈善营销营销效果影响因素作用机制消费者行为

Thermal Stress Monitoring on Piston Rings by Real Time Holographic Interferometry

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Optics and Photonics Journal 2013年第8期3卷 379-384页

作者： Stephen N. Maina Geoffrey K. Rurimo Patrick M. Karimi dickson M. Kinyua Calvin F. Ominde Department of Physics Jomo Kenyatta University of Agriculture & Technology Nairobi Kenya Department of Physics Kenyatta University Nairobi Kenya

In this paper, real time holographic Interferometry (RTHI) technique was used to monitor the thermal stress on the piston rings. The piston rings holograms were recorded and the holographic plate replaced on the holder after development. The piston ring was subjected to thermal stress as it was illuminated by Laser beam acting as the object beam. This process led to generation of interferograms which were captured by a CCD camera at different temperatures. The captured interferograms were analyzed using atmosfringe version 3.3 software. From the analysis, the peak to valley (P-V) aberrations measured for each of the piston ring varied for the same temperature value. The P-V aberrations ranging from 0.0128λ to 1.2989λ were obtained. From this result, it was evident that the three rings on the piston had different unique structural characteristics due to their function.

关键词： Interferogram Hologram Aberration Piston Ring Laser Beam

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抗菜蛾甘兰的选育

国外农学（植物保护） 1992年第2期5卷 28-29页

作者： M.H.dickson 刘(王乐)善

本文介绍了在美国和洪都拉斯进行的甘兰近交、杂交品系对莱蛾抗性的田间比较研究.实验表明,光叶甘兰较蜡叶甘兰具有更高的抗性,而商品生产甘兰则无抗性.若能适当选配亲本,可培育出既有优良商品价值、又有较高抗莱蛾特性的甘兰生产品系;... 详细信息

本文介绍了在美国和洪都拉斯进行的甘兰近交、杂交品系对莱蛾抗性的田间比较研究.实验表明,光叶甘兰较蜡叶甘兰具有更高的抗性,而商品生产甘兰则无抗性.若能适当选配亲本,可培育出既有优良商品价值、又有较高抗莱蛾特性的甘兰生产品系;这对气温较高、莱蛾为害严重的地区,是经济实用的.

关键词：抗虫性育种甘兰

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柴油机曲轴箱排放的控制

国外内燃机车 1997年第8期 13-14页

作者：王延飞 Gary dickson Kathy Edge

Comparative evaluation of a rapid diagnostic test,an antibody ELISA,and a pLDH ELISA in detecting asymptomatic malaria parasitaemia in blood donors in Buea,Cameroon

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Infectious Diseases of Poverty 2017年第1期6卷 931-939页

作者： Tebit Emmanuel Kwenti Longdoh Anna Njunda Beltine Tsamul Shey dickson Nsagha Nguedia Jules-Clement Assob Kukwah Anthony Tufon Dilonga Henry Meriki Enow George Orock Department of Medical Laboratory Sciences Faculty of Health SciencesUniversity of BueaP.B.63BueaSouthwest RegionCameroon Department of Public Health and Hygiene Faculty of Health SciencesUniversity of BueaP.B.63BueaSouthwest RegionCameroon Blood Bank Regional Hospital BueaP.B.32BueaSouthwest RegionCameroon Programme in Medicine Faculty of Health SciencesUniversity of BueaBueaSouthwest RegionCameroon

Background:In malaria endemic areas,infected blood donors serve as a source of infection to blood recipients,which may adversely affect their *** necessitates the proper screening of blood to be used for transfusion in these *** purpose of this study was to determine the prevalence of malaria parasitaemia in blood donors in Buea,Cameroon,and to evaluate the performance of a rapid diagnostic test(RDT),a malaria antibody enzyme-linked immunosorbent assay(ELISA),and a Plasmodium lactate dehydrogenase(pLDH)ELISA in the detection of asymptomatic malaria parasitaemia in the target ***:In a prospective study conducted between September 2015 and June 2016,1240 potential blood donors were *** donors were screened for malaria parasites using Giemsa microscopy(GM)and a RDT.A sub-sample of 184 samples,comprising 88 positive and 96 negative samples,were selected for the evaluation of the pLDH ELISA and the antibody *** chi-square test and correlation analysis were performed as part of the statistical *** statistical significance cut-off was set at P<***:The prevalence of malaria parasitaemia in this study was found to be 8.1%(95%CI:6.6-9.7).The prevalence was not observed to be dependent on the age or sex of the *** RDT had a sensitivity(88.0%),specificity(99.1%),and negative predictive value(99.0%)higher than the *** performance of the pLDH ELISA,which demonstrated the highest positive predictive value(91.6%),was generally comparable to the *** sensitivity was lowest with the antibody ELISA(69.9%),which also demonstrated the highest false positive and false negative *** detection threshold for the pLDH(three parasites/μl)was lower compared to the RDT(50-60 parasites/μl).Non-significant positive correlations were observed between the parasite density and the pLDH titers and malaria antibody ***:Overall,the RDT and the pLDH ELISA demonstrated a perfectly correlated agreem

关键词： Blood transfusion Malaria RDT pLDH ELISA Malaria antibody ELISA Comparative evaluation Sensitivity Specificity Buea Cameroon

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成都市大学生男男性行为人群艾滋病性病高危行为现状调查

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现代预防医学 2010年第8期37卷 1543-1546页

作者：邓斌江华王文渊 Charles Damien Lu Sean Robert dickson 赖文红杨浩刘毅四川大学华西公共卫生学院四川省疾病预防控制中心爱白成都青年同志活动中心爱白文化教育中心 University of Michigan 四川大学数学系

[目的]了解成都市大学生男男性行为(MSM)人群性行为现状,为制定高危人群防治策略提供依据。[方法]采取"网络调查"和传统"滚雪球"调查相结合的方法对成都市大学生MSM人群性行为进行调查,所有数据使用SPSS13.0进行分析。[结果]回收有效问... 详细信息

[目的]了解成都市大学生男男性行为(MSM)人群性行为现状,为制定高危人群防治策略提供依据。[方法]采取"网络调查"和传统"滚雪球"调查相结合的方法对成都市大学生MSM人群性行为进行调查,所有数据使用SPSS13.0进行分析。[结果]回收有效问卷共617份。调查对象平均年龄(21.51±2.27)岁。62.4%的受访者自我认同为同性恋,28.8%的受访者自我认同为双性恋。89.5%的受访者认为同性恋是正常性行为,21.5%的受访者认为自己以后不会与异性结婚,有21.4%的受访者已经与异性发生过性行为。41.8%的受访者近1个月与固定性伴每次肛交都使用安全套,62.9%的受访者与固定性伴最近1次肛交时使用了安全套;56.7%的受访者近1个月与非固定性伴每次肛交都使用安全套,25.1%受访者与非固定性伴最近1次肛交时未使用安全套。艾滋病性病知识来源于综合网站和同志网站分别是59.8%和42.5%,来源于朋友和同志工作组分别为24.5%和15.4%。[结论]高危行为在大学生MSM群体中存在,该群体大多数同志并未意识到所面临的HIV及性病威胁。未来的干预应重点增加对大学生男同性恋群体自我认同及心理支持的关注,有针对性的开发安全套推广策略以及创新性的动员大学生同志开展与其环境和群体文化相适应的干预活动形式。

关键词：大学生男男性行为(MSM) 艾滋病行为调查

Application of Multivariate Analysis for Identification of Pollution Sources in the Densu Delta Wetland in the Vicinity of a Landfill Site in Ghana

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Journal of Water Resource and Protection 2010年第12期2卷 1020-1029页

作者： Juliet Osei Frank Kwakyi Nyame Thomas Kaku Armah Shiloh Kwabena Osae Samuel Boakye Dampare Joseph Richmond Fianko dickson Adomako Nash Bentil 不详

Surface water samples collected from various sites in the Densu delta wetland, Ghana, were analyzed for pH, temperature, TDS, EC, turbidity, TSS, alkalinity, HCO3-, BOD, COD, Na, K, Mg, Ca, Cl, SO42-, PO4-P, NO3-N, Cr, Pb, Cd, Cu, Co and Fe using titration and Atomic Absorption Spectrometer (AAS). Multivariate statistical analyses such as cluster analysis (CA) and principal component analysis (PCA) were used to identify heavy metal pollution in the wetland area. Results from CA and PCA suggest positive relationships between the two analyses. Linear correlation analysis done also suggests similar relationships. Heavy metals were identified as originating from a common source in all the analyses. The hydrochemistry of the area appears to have been influenced, to a large extent, by dissolution/precipitation as well as numerous but subsistence small-scale agricultural activities that take place in the wetland environment.

关键词： Densu Delta Wetland Surface Water Pollution Cluster Analysis (CA) Principal Component Analysis (PCA)

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