赜墨和胶印孰优孰劣？

过去人们在说“在不久的将来,现在用大胶印机印刷的活件以后会在喷墨数码印刷机上印刷”的时候,你会笑话他们,因为你认为这事儿永远不可能。不过,今天你可能已经不会再笑话别人了,因为喷墨技术在过去几年里的进步之快,远出乎业内很多人士的预期。     

印刷企业积极进取的力量

Julie：在过去的几周里,美国和世界金融市场经历了非常困难的时期。世界上一些大型的银行机构和投资公司纷纷破产或由政府接管。在未来的几周里,世界各地可能会有更多的金融公司带来更多的坏消息。许多金融专家们对世界经济充满沮丧和悲观的情绪。     

Mental Representation of Literary Characters as a Distinct Aspect of Response to Literature

This article investigates mental representations of literary characters and their relations with other aspects of response to literature and age, gender, and expertise. A Saga chapter and the beginning of a contemporary novel were presented to 16 participants from each of three age groups (13 years, 17 years, adults) equally divided by gender and expertise level. After having evaluated the texts with rating scales, participants were interviewed on the main character of each text. The similarity between participants’ answers was computed and used for a cluster analysis. Four clusters (representation types) were identified for one character and five for the other. Character representation was affected by age but not by expertise and gender, and was unrelated to other aspects of response to literary text. Explicit ratings of the texts, instead, were affected by expertise. Theoretical and educational implications are discussed.     

The making of homophilic networks in international research collaborations: A global perspective from Chilean and Korean engineering

As globalization has expedited mobility of faculty across nations, faculty hiring is taking place at an international level. Institutions and governments often perceive hiring faculty who were trained in different countries as a strategy for reaching the status of world-class universities. The major assumption behind this hiring strategy is that faculty who are educated in prestigious universities in foreign countries will bring cutting edge knowledge and networks that will lead to future research collaborations. Yet, a dearth of research empirically investigated the assumption that institutions that train future foreign faculty and those that hire faculty with foreign degrees will have greater presence in the international networks of research collaboration. Filling this hole, this study examines this assumption from an international perspective, using the case of industrial engineering departments at selective research universities in Chile and Korea. Based on the unique data that document faculty hiring (degree attainment institutions) and research collaboration (co-authorship), and institutional prestige (global ranking positions), we analyzed the relationship between faculty hiring network and research collaboration network, as well as their association with institutional prestige. The results provide strong evidence of the positive relationships between doctoral training and future research collaboration, and the strong presence of institutions with global prestige. These relationships result in homophilic networks that suggest a concern about a reduced diversity in theoretical perspective and research methods within the disciplinary field.     

Silica glass interaction with calcium hydroxide: a surface chemistry approach

The study of the interaction between silica glass and saturated Ca(OH)₂ solutions can be a useful approach to resolve the problem of the adhesion between lime-sand mortar and clay bricks. Since it is reasonable that the silica–calcium hydroxide system well simulates a brick–mortar system, experimental observations concerning the interaction of silica glass and this strong basic solution should be of value for the comprehension of the chemical reactions that could take place at the mortar–brick interface, maybe affecting the adhesion between the two building materials. We demonstrated the effects of saturated Ca(OH)₂ solutions on commercial pure silica glass (fused silica) and on silica films obtained via a sol–gel process by means of dip-coating. Silica samples were dipped in the solutions at different temperatures (room temperature, 60 and 80 °C) and at different time intervals (1 and 21 h) and then they were analysed by means of surface techniques: X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS) and atomic force microscopy (AFM). It has been shown that Ca(OH)₂ reacts with the silica glass network. The experimental results clearly show a very different behaviour of sol–gel silica with respect to fused silica, probably because of their different nanostructure. Many problems concerning the interaction of silica and Ca(OH)₂ are still to be solved, but the results of this research strengthen the idea that adhesion between lime-sand mortar and clay bricks is caused not only by carbonation of calcium hydroxide contained in the mortar, but even by some chemical reactions involving the brick constituents and calcium hydroxide itself. The final products, calcium silicates, may induce a chemical continuity between lime-sand mortar and clay bricks.     

Argumentative abilities in metacognition and in metalinguistics: a study on university students

The article presents a study on metalinguistic, cognitive and metacognitive abilities in university students. A sample of 353 students was recruited; 178 of which from scientific and 175 from humanistic Faculties, with gender balance (M = 178; F = 175) whose age range was between 20 and 25 years old. They were administered a metalinguistic ability test that assesses metalinguistic awareness at implicit and explicit levels (L and ML scores) and the Raven’s Standard Progressive Matrices 38 (SPM38). In addition to the usual nonverbal administration of the matrices, candidates were asked to justify in written form the reasons for the solution indicated in each item. Three scores were considered for the SPM38: the ordinary score based on the number of correct nonverbal solutions (O.S.), a 7-point scale for assessing the argumentation of the correct solutions (C.ARG.S.) and a 6-point scale for assessing the argumentation of the incorrect solutions (I.ARG.S.). Significant gender and curriculum effects were found, with males and scientific students dominating at the nonverbal level while females and humanistic students dominated in the argumentative abilities related to the matrices and in all the scores of the metalinguistic test. A number of significant correlations were found between all the metalinguistic, cognitive and metacognitive abilities considered, with a prominent role of the metalinguistic abilities at the explicit level (ML score) that show a clear argumentative structure very similar to the C.ARG.S. argumentations in the matrices test.     

Understanding risks,benefits, and strategic alternatives of social media applications in the public sector

Social media such as blogs, microblogs or electronic social networks can transform the ways in which we relate to other people and organizations. Government organizations are experimenting with social media to communicate with their constituents, and many analysts see in these media a powerful set of tools to reinvent government–citizen relationships. In this paper, we present the perceptions of risks, benefits and strategic guidelines about social media applications gathered from 250 public servants from Central Mexico, most of them working in information technology, as web masters or responding to Freedom of Information Act requests. The conclusions of the analysis are 1) that governments' participation in social media may result in improved communication and citizen participation, more transparency, and transfer of best practices among government agencies; 2) that a good implementation strategy is necessary to realize these benefits and to avoid risks; and 3) that the implementation of social media highlights the importance of updating laws and regulations, and of promoting changes in government culture and organizational practices.     

Perceived importance of occupations by adolescents with and without learning disabilities

A study of the perceived importance of 23 occupations by 65 adolescents with learning disabilities and 85 adolescents without learning disabilities revealed that occupations were ranked similarly by the two groups (Rho = .76). Analysis of the groups' rank order indicated diversity of students' perceptions about the importance of various occupations.