Depth drives growth dynamics of dreissenid mussels in Lake Ontario

Understanding dreissenid mussel population dynamics and their impacts on lake ecosystems requires quantifying individual growth across a range of habitats. Most dreissenid mussel growth rates have been estimated in nutrient rich or nearshore environments, but mussels have continued to expand into deep, cold, low-nutrient habitats of the Great Lakes. We measured annual quagga mussel (Dreissena rostriformis bugensis) growth at 15 m, 45 m, and 90 m in Lake Ontario using caged mussels near Oswego, New York, USA from June 2018 to May 2019. Quagga mussel growth (starting size 12 mm) was greatest at 15 m (mean shell length increase = 10.2 mm), and was lower at 45 m (5.9 mm) and 90 m (0.7 mm). Caged mussels were obtained from near the 90-m site and those reared at 15 and 45 m developed thicker shells than those that were caged at 90 m. We observed relatively high colonization by quagga and, to a lesser degree, zebra mussels (Dreissena polymorpha) at 15 m, very few colonizers at 45 m, and none at 90 m. Higher growth potential, but low natural mussel densities observed at 15 m and 45 m suggest factors other than growth limit dreissenid abundance at these depths. The relatively slow dreissenid growth rates observed in offshore habitats are consistent with the gradual abundance increases documented in these zones across the Great Lakes and suggest new mussels that become established in these habitats may contribute to ecosystem effects for decades.     

Establishing a search department in Bangalore, India

Philips Intellectual Property & Standards (IP&S) decided in 2001 to start a search department in Bangalore to cope with an increasing amount of novelty searches and as a more attractive alternative to outsourcing. Bangalore was chosen for the availability of a Philips infrastructure, well educated people and a comfortable cost level. Supported by the efforts of the existing staff, the WON/GO training and a mature management system, a stable well performing search department is now in place.     

员工招聘风险防范的经济学分析

企业与求职者之间关于求职者能力认知的信息不对称导致企业面临两种逆选择风险。这两种风险都会给企业带来显著的费用增加和机会损失。从经济学角度,运用相应的数学模型,讨论了避免招聘风险的3项具体措施———增加信息对称程度、确定合理的雇佣标准、采取相应措施改善求职者能力的分布,并评价不同措施的有效性。每一家需要招聘的企业都希望招聘的成本———效益最好并且在招聘时尽可能增加合适的求职者所占的比例,最大限度的减少筛选成本,这就要求企业在招聘过程中应采用上述措施来规避招聘风险,减弱信息不对称带来的不利影响,从而使企业在激烈的市场竞争中获得竞争优势。     

事业单位聘用制度改革中存在的问题及对策分析

我国事业单位聘用制度改革在短期内取得了可喜的成绩,但也存在一些困难问题,一方面是传统观念和意识的阻碍,另一方面是配套政策不完善使聘用制度改革难以进一步深入。解决这些困难和问题,必须在加强宣传和教育的同时,不断学习和研究新政策,完善与聘用制度相关的配套政策改革。     

Exploring the value of project management certification in selection and recruiting

For many years project management has been moving toward professionalization through voluntary certification. Simultaneously, recruiters increasingly use voluntary professional certification as a signal of applicant competencies and likely future performance, to increase the efficiency of the selection process. This practice increases the value of certification to holders and leads to the growth of certification. However, despite significant research into the value of voluntary certification in numerous occupations, results linking certification with performance are tentative at best. We contribute to the growing body of research exploring the performance signaling ability of certification by empirically examining the case of project management professional certification using survey responses from 452 (certified (370), and uncertified (82)) international project managers. Our findings provide some support for this recruitment and selection practice, not through a direct relationship between certification and performance but by showing that self-efficacy mediates the relationship. Certification also relates to higher levels of professionalism. We conclude with a discussion of the implications of these findings for recruiters, project management professionals, and professional associations.     

模糊数学对招募专员绩效评估的应用

主要介绍招募系统中模糊数学综合评价方法对招募专员绩效评估的应用。在算例中,首先人事经理给出招募专员的绩效考核方法,然后建立模糊综合评价模型,最后运用该模型对招募专员绩效进行科学、客观的评价。模糊数学理论为招募专员绩效评估提供一种方法。     

基于ASP的招生信息动态网站管理系统的实现

针对招生信息网站管理的需求,利用ASP技术设计开发了招生信息动态网站管理系统,简要说明了系统的主要功能,并对系统实现的几个关键技术如用ASP打开数据库的方法、系统权限管理、系统安全机制等进行了较深入的探讨。通过对招生信息动态网站管理系统的开发以及三年多的运行分析,ASP技术由于使用简单和开发周期短,非常适合中小型动态网站信息管理系统的开发。     

面向大学生就业的网站设计

随着高校大学生招生规模的不断扩大,每年进入社会的高校毕业生人数急剧增长,网络招聘成为大学生就业的一种快捷有效的就业渠道。文章分析了目前众多招聘形式中网络招聘的优势,给出能有效促进大学生就业的校园招聘网站的设计规划。     

生物化工/制药企业保留核心员工实战策略

人力资源是企业制胜的关键，如何保留核心员工是每个企业孜孜以求的管理密笈。本文分别从招聘留才、把员工塑造成企业的主人、企业发展留人、激励制度留人、职业适应留人、公平竞争机制留人、建立合理化建议制度、制定明确的绩效目标、企业文化留人、激励导向式的薪资策略与自助餐式的福利政策相结合等几大方面阐述了生物化工／制药企业的留人策略。     

老年非小细胞肺癌肺复张后的二次IMRT研究

本研究以探讨老年非小细胞肺癌(NSCLC)在调强放疗(IMRT)期间,其患侧肺的复张对受照体积及其计划剂量参数的影响。选择了15例Ⅱ-Ⅳ期老年NSCLC合并肺不张患者,以放疗前(CT1)和放疗32 Gy时(CT2)扫描的CT图像为依据,分别设计调强计划P60和P32+P28。结果发现:CT2-GTV(Gross tumor volume,CT2上的大体肿瘤体积,其他同)和CT2-PTV(Planned target volume,CT2上的计划靶区,其他同)的平均受照体积,显著低于CT1-GTV和CT1-PTV,而CT2-Lung患侧的平均体积则较CT1-Lung患侧有了显著增加,结果有统计学意义(p<0.05)。除了食管V50(接受50 Gy剂量的食管体积,%)外,实验中其余正常组织的各项受照剂量指标间差异均有统计学意义(p<0.05)。因此老年NSCLC合并肺不张患者,在放疗32 Gy后,即有必要复查肺是否已复张,并重新设计IMRT计划,使得老年NSCLC患者在肺复张后的心肺受照剂量更低。