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1.1.10. 工作紧密性与跳槽
近似原文(原文也许为此稿缩略版) vitalia
According to Mitchell et al. (2001), job embeddedness represents a broad cluster of ideas that influence an employee's choice to remain in a job, operating like a net or a web in which an individual becomes enmeshed. A person who is highly embedded has many connections within a perceptual life space (Lewin, 1951). Moreover, a person can become enmeshed or embedded in a variety of ways (both on and off the job). The critical aspects of job embeddedness are the extent to which the job is similar to or fits with the other aspects in their life space, the extent to which the person has links to other people or activities, and the ease with which links can be broken--what they would give up if they left. These dimensions are called fit, links and sacrifice. Less concerned with the influence of any one specific connection, job embeddedness focuses on the overall level of connectedness (Mitchell et al., 2001).
（介绍工作嵌入度的三个方面：fit （适合）, links（联系） and sacrifice（损失）

According to the theory of job embeddedness (Mitchell, Holtom and Lee, 2001), an employee's personal values, career goals and plans for the future must fit with the larger corporate culture and the demands of his or her immediate job (e.g., job knowledge, skills and abilities). In addition, a person will consider how well he or she fits the community and surrounding environment. Job embeddedness assumes that the better the fit, the higher the likelihood that an employee will feel professionally and personally tied to the organization.
（讲第一方面----fit（适合），员工的个人价值，职业目标和未来计划必须与公司文化以及他/她个人的工作相一致，也就是fit。员工自己也会考虑自己是否fit其所属团体与环境。越fit，员工越有归属感，越不会跳槽。）

Job embeddedness theory suggests that a number of threads link an employee and his or her family in a social, psychological, and financial web that includes work and non-work friends, groups, the community, and the physical environment where they are located. The greater the number of links between the person and the web, the more likely an employee will stay in a job (Mitchell et al., 2001).
（讲第二方面----Link（联系）。与方方面面联系越紧密，员工越愿意留在公司。）（注意这段的小列举）

The concept of sacrifice represents the perceived cost of material or psychological benefits that are forfeited by organizational departure. For example, leaving an organization may induce personal losses (e.g., losing contact with friends, personally relevant projects, or perks). The more an employee will have to give up when leaving, the more difficult it will be to sever employment with the organization (Shaw et al., 1998). Examples include non-portable benefits, like stock options or defined benefit pensions, as well as potential sacrifices incurred through leaving an organization like job stability and opportunities for advancement (Shaw et al., 1998). Similarly, leaving a community where they are highly involved in local organizations can be difficult for employees.
（讲第三方面----sacrifice（损失）。员工在各方面损失越大，越不愿跳槽）（注意这段的小列举）

One key area where job embeddedness complements traditional approaches to voluntary turnover is community attachment. The model explicitly considers the impact of both organizational and community influences on the three job embeddedness dimensions. Put differently, each of the three dimensions--fit, links and sacrifice--has organizational and community components, which are summarized in Table 2. In two reported tests, Mitchell, Lee and colleagues (Mitchell et al., 2001; Lee et al., 2004) have demonstrated that job embeddedness predicts variance in voluntary turnover over and above job satisfaction.
（讲job embeddedness（工作嵌入度）对理解主动跳槽有一个重要的补充，这就是归属感。Job embeddness模型认为组织（偏公）和社团（偏私）对job embeddedness的三个方面------fit, links and sacrifice都有影响。模型作者认为：在预测员工“主动跳槽”方面，job embeddedness比job satisfaction更有优势。）

To date, job embeddedness has been tested in the hospital, grocery and banking industries. To extend the generalizability of the model, we propose to test it across multiple, diverse industries. Thus, the following hypotheses replicate Mitchell et al.'s findings:

Hypothesis 1: Job embeddedness is negatively correlated with voluntary turnover （主动跳槽）.
（工作嵌入度越高，员工越不愿跳槽. Job embeddedness 和 turnover是 反比关系）
Hypothesis 2: Job embeddedness improves the prediction of voluntary turnover above and beyond that accounted for by job satisfaction（工作满意度）.
（job embeddedness工作嵌入度的大小，对员工跳槽的影响要超过job satisfaction工作满意度大小对员工跳槽的影响。）

myice

1.1.12. 捆绑销售策略
Reference: dec0412. 打了好一会字, 然后未保存丢失… 再打一遍……
Definition of "Bundling": Sometimes companies bundle products together in order to promote a new product or to encourage consumers to try a complementary product, such as a free small conditional bundled with a shampoo purchase, or a free disposable razor with a shaving cream purchase. A company may also offer a bonus pack or a special pack with 20% more in order to encourage a customer to purchase a product.
边打这个边想起COX：昨天晚上COX送了一个大箱子过来，结果只有一根网线和大半箱广告。

myice

2.1.6. 鸟类声音系统的进化
原文后两段
A few years ago, Jarvis and his colleagues made the surprising discovery that when a songbird, parrot or hummingbird is producing its learned vocalization, a set of seven similar structures in the birds’ brains become active. The finding was unexpected because the three avian groups are only distantly related to one another. At the same time, they are closely related to other birds that are not vocal learners. Flycatchers, for example, belong to the same order as songbirds—Passeriformes—yet no flycatcher species tested so far displays the trait. One possible explanation, says Jarvis, is that the three groups of vocal learning birds had a common ancestor that possessed the skill. “But this means there would have been multiple losses of the ability over time, a sort of mass extinction of vocal learning,” he says. Another hypothesis is that vocal learners evolved similar brain structures independently over the last 65 million years, much the same way that birds and bats separately evolved wings that turned out to be so much alike.

Discoveries about the human brain support this latter hypothesis. Scientists conducting imaging studies have found that when people speak, parts of their brains’ cerebrums that are similar to those of vocalizing songbirds, parrots and hummingbirds become active. They’ve also found that the same neural pathways are damaged in people who have lost the ability to speak due to injury or stroke. Jarvis now believes that vocal learning most likely developed independently in humans and the three bird groups (as well as in other learners whose brains have not been studied)—yet it arose from a pre-existing brain system, probably shared by all vertebrates, that controls learning to move.

myice

2.2.2. 地球降温
节选自Plateau Uplift and Climate Change (Scientific American Magazine @ March 1991)
Author：William F. Ruddiman and John E. Kutzbach

During the past 40 million years, and particularly during the past 15 million years, this warm, wet climate largely disappeared. Colder climates and much greater regional extremes of precipitation have developed. What caused this cooling and diversification of climate and vegetation into a complex mosaic of many regionally distinctive types?

One school of thought focuses on the changing positions of the earth’s continents and oceans. The Atlantic Ocean has expanded at the expense of the Pacific Ocean, whereas an ancient equatorial sea that extended across much of Eurasia (called the Tethys Sea) has shrunk to become the modern, much smaller Mediterranean Sea. In addition, the fraction of continents flooded by shallow inland seas has slowly decreased, exposing large amounts of land and creating climates less moderated by the temperature-stabilizing effects of oceans. Computer model simulations show that changes in the arrangement of the continents and the size of inland seas can have important effects on global climate over very long intervals of geologic time. But they are significantly less convincing as sole explanations for the dramatic changes of the past 40 million years.

Another possibility is a long-term decline in the concentration of carbon dioxide in the atmosphere, which would lessen the amount of heat trapped by the atmosphere and lead to “greenhouse cooling.” The amount of carbon dioxide in the earth’s atmosphere over million-year timescales is controlled by two major processes. Chemical weathering of continental rocks removes carbon dioxide from the atmosphere and carries it in dissolved chemical from to the ocean, where it is taken in by marine biota and deposited in sediments on the seafloor. Tectonic activity eventually frees this trapped carbon dioxide, in the earth’s lithospheric plates transports the seafloor to ocean trenches, where subduction carries old crust and sediments down toward the earth’s hot interior. At great depths, the sediments melt, releasing carbon dioxide, which emerges from the volcanic islands that overlie the buried curst and rejoins the atmosphere, completing the cycle.

If the pace of seafloor spreading (and hence of subduction) slowed significantly, less carbon dioxide would be vented to the atmosphere, the atmosphere would become relatively depleted of carbon dioxide and temperatures would fall. In fact, globally averaged seafloor spreading rates slow little or no net change in the past 40 million years. Subduction and volcanism eventually return the carbon dioxide to the atmosphere, but this process requires a long time (tens to hundreds of millions of years) to complete.

Plateau uplift may alter climate by increasing chemical weathering of rocks, thereby reducing atmospheric carbon dioxide concentrations. Carbon dioxide combines with rainwater and ground water to form carbonic acid, which reacts with silicate minerals in rocks during weathering. The resulting bicarbonate ions drain into the oceans, where they are taken up by marine animals such as plankton and corals and eventually deposited on the seafloor. The net effect is that chemical weathering removes carbon dioxide from the atmosphere and locks it away at the bottom of the oceans.

Maureen Raymo proposed that uplift of plateaus and mountain ranges has increased the rate of chemical erosion of continental rock on the globally averaged basis. Uplift could enhance chemical weathering in several ways. Heavy monsoons, which develop at the margins of plateaus, unleash particularly intense rainfall. In these regions, uplift-related faulting and folding also expose fresh rock to the weathering process. Moreover, the steeper slopes created by plateau uplift cause faster runoff, which removes erosion products and intensifies the chemical attack on the rock. Raymo suggests that long-term uplift in Tibet and other regions may have increased the rate at which carbon dioxide is removed from the atmosphere. In this way, concentrations would have fallen even though the amount of carbon dioxide exhaled by volcanoes (as inferred from seafloor spreading rates) remained nearly constant. Falling carbon dioxide levels would reduce the ability of the atmosphere to retain heat, thereby amplifying the global cooling.