共查询到20条相似文献，搜索用时 31 毫秒
1.
Iron ore as pozzolanic filler is an uncommon constituent of historic plaster rarely reported in any research. This paper presents one such study from western India where hematite instead of crushed bricks was identified as admixture in thirteenth–sixteenth-century CE Mughal masonry lime works of Daulatabad Fort. The outer/inner coat plasters from different locations of the fort were examined for morphological, mineralogical, chemical, and basic physical properties. The analytical investigative study was performed by optical microscopy, sieve analysis, X-ray fluorescence, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, SEM-EDX, and thermal analyzer. Although the plaster is dominantly made of micritic calcite and aggregate, incorporation of gypsum in the outer and inner coats has been detected and probably acted as a second binder. Cannabis sativa was mixed in the plaster, pointing to the knowledge of hempcrete technology by the makers of Daulatabad Fort. This investigation has now provided essential information with enough precision about this historic plaster for formulation of compatible repair materials essential for the site restoration. 相似文献
2.
《文物保护研究》2013,58(1):50-57
AbstractThe conservation of roofing and cladding materials has both environmental and cultural heritage bearing. Our research aimed at comparing the performances of some polymeric products used for the protection of a typical Italian sandstone, the ‘Agro d'Ardesia’, used mostly as cladding, paving, roofing, and building material. These products belong to three different classes: polysiloxanes, acrylics, and fluoropolymers. In addition, an acrylic–silicone mixture was chosen for testing. After the application onto the Agro sandstone by capillary absorption, both efficacy and durability were assessed. Particularly, two types of weathering tests were performed to check the stability over time of the protective products: the exposure to ultraviolet radiation in a climatic chamber and the ageing by exposure to acid rain, expressly designed to represent realistically natural and anthropogenic changes. Detailed information on treatment performances was obtained. The polysiloxane was shown to be the most effective protective material for the Agro sandstone. 相似文献
3.
《Communication monographs》2012,79(2):87-148
In this paper we report on a longitudinal case study of an administrative unit of a large nonfederal government following the election of a new Chief Elective Official. In this case, the changing climate becomes a dominant characteristic of the emerging situation. Poole and McPhee's (1983) extension of Giddens' Structuration Theory is employed as an analytic framework, tracing through the evolution and transformation of climate themes in the case. We find new categories of, and conditions affecting, climate—theme emergence, spread, and sedimentation. More particularly, the case demonstrates the complexity of organizational climate, with several processes interacting simultaneously to generate a constantly changing climate in the course of reproducing the organization's culture and beliefs. Importantly, the case shows how these complex climate processes are related to demoralization and counterintentional results in organizational change. 相似文献
4.
《Communication monographs》2012,79(2):71-130
The effects of interpersonal reward and violations of conversational distancing expectations on compliance and interaction behaviors were tested in three retail shopping settings. Subjects were salespeople (N = 70, N = 49, N = 104) who were approached by confederates posing as customers or students conducting interviews on consumer behavior. Two levels of interpersonal reward (high versus low levels of apparent status, attractiveness, purchasing power and/or expertise) and three levels of distance (close violation, norm, far violation) were manipulated. Results showed high reward to induce more compliance with a request and more favorable interaction patterns than low reward. Distance violations evoked more arousal, activation and apparent distraction, while the favorability of reactions to distance violations tended to vary by reward level, as expected. Confounding effects of gender, confederate communication style, and possible nonverbal norms for compensation and reciprocity are also discussed. 相似文献
5.
G. Chandler 《International Information and Library Review》2013,45(3):233-235
The article reviews various definitions of information literacy and discusses a study conducted at the King Fahd University of Petroleum and Minerals (KFUPM) Library to reassess the need for information literacy, to identify factors which influenced non-attendance, to evaluate the impact of the program, and comments and suggestions used. The major findings include: there is a dire need for information literacy; participants found the programs useful; and one-on-one method coupled with seminars were more effective and more preferred by the participants. The article also advances a set of recommendations for improving bibliographic retrieval education programs at the KFUPM Library and other libraries in Saudi Arabia and other countries. 相似文献
6.
Sarah Lonsdale 《Media History》2015,21(3):265-279
The enormous changes wrought in the British newspaper industry during the late nineteenth and early twentieth centuries brought about a revolution in newspaper reading habits, financing and influence, all aspects of which have been well documented by historians of the press. But what of the contributor, particularly the freelance whose millions of words formed, mostly anonymously, the content of the new mass market press? How did writers negotiate changes in the literary marketplace during this time as editors demanded more ‘news’ and less in the way of whimsical paragraphing, and sketches, the traditional newspaper output of the professional man, or woman, of letters? Through the study of memoirs, correspondence and the fictional output of contributors to the press during this time, it is possible to discern the often fraught relations between writers and their most lucrative market. 相似文献
7.
Seung-A Annie Jin 《广播与电子媒介杂志》2013,57(2):169-186
This research examined various predictors of flow in video games. Study 1 examined the effects of performance on flow across two game genres (shooting and medical simulation games) and demonstrated that successful performance results in greater flow. Study 2 demonstrated an interaction effect of skill and challenge on flow across three genres (racing, violent, and prosocial games). Highly skilled players experience greater flow when encountering higher challenge whereas players with moderate and low levels of skill experience less flow when encountering higher challenge. Study 3 tested the moderating role of users' playfulness in an exergame and a music game. 相似文献
8.
Dean Hendrix 《Journal of the Medical Library Association》2008,96(4):324-334
Objective:
The objective of this study was to analyze bibliometric data from ISI, National Institutes of Health (NIH)–funding data, and faculty size information for Association of American Medical Colleges (AAMC) member schools during 1997 to 2007 to assess research productivity and impact.Methods:
This study gathered and synthesized 10 metrics for almost all AAMC medical schools (n = 123): (1) total number of published articles per medical school, (2) total number of citations to published articles per medical school, (3) average number of citations per article, (4) institutional impact indices, (5) institutional percentages of articles with zero citations, (6) annual average number of faculty per medical school, (7) total amount of NIH funding per medical school, (8) average amount of NIH grant money awarded per faculty member, (9) average number of articles per faculty member, and (10) average number of citations per faculty member. Using principal components analysis, the author calculated the relationships between measures, if they existed.Results:
Principal components analysis revealed 3 major clusters of variables that accounted for 91% of the total variance: (1) institutional research productivity, (2) research influence or impact, and (3) individual faculty research productivity. Depending on the variables in each cluster, medical school research may be appropriately evaluated in a more nuanced way. Significant correlations exist between extracted factors, indicating an interrelatedness of all variables. Total NIH funding may relate more strongly to the quality of the research than the quantity of the research. The elimination of medical schools with outliers in 1 or more indicators (n = 20) altered the analysis considerably.Conclusions:
Though popular, ordinal rankings cannot adequately describe the multidimensional nature of a medical school''s research productivity and impact. This study provides statistics that can be used in conjunction with other sound methodologies to provide a more authentic view of a medical school''s research. The large variance of the collected data suggests that refining bibliometric data by discipline, peer groups, or journal information may provide a more precise assessment.Highlights
- Principal components analysis discovered three clusters of variables: (1) institutional research productivity, (2) research influence or impact, and (3) individual faculty research productivity.
- The associations between size-independent measures (e.g., average number of citations/article) were more significant than associations between size-independent bibliometric measures and size-dependent (e.g., number of faculty) bibliometric measures and vice versa, except in the case of total National Institutes of Health (NIH) funding.
- The factor coefficients, or loadings, for total NIH funding may associate more with the quality of research rather than the quantity of research.
- The removal of twenty outliers, fourteen highly productive or influential medical schools and six medical schools with relatively low research profiles, changed the results of the analysis significantly.
- This study''s broad institutional bibliometric data sets cannot be extrapolated to specific departments at the studied medical schools.
Implications
- Librarians, administrators, and faculty should use several methodologies in tandem with bibliometric data when evaluating institutions'' research impact and productivity.
- Health sciences librarians should not make use of university rankings materials lacking strong methodological foundations.
- This study''s bibliometric data may provide a starting point or point of comparison for future assessments.
9.
Kristin N. Djorup 《Journal of Business & Finance Librarianship》2013,18(2):183-185
This case study presents the revision of an upper-division one-shot instruction session to include an online tutorial that introduces students to business information sources prior to the library session. In order to complete the assignment and prepare for the library session, students are prompted to find specific information using the given resource, and then consider questions regarding the information retrieved. Students in a 3000-level business writing class responded positively to the activity while providing a good amount of material to inform further iterations of the assignment. 相似文献
10.
ABSTRACTThis work presents a study of samples of the mural painting The Allegory of the Industrial Development of São Paulo (Alegoria ao Desenvolvimento Industrial Paulista), made in the city of São Paulo, Brazil, by the artist Fulvio Pennacchi. Using transmitted light petrographic microscopy, scanning electron microscopy coupled with energy dispersive X-ray spectrometry, and X-ray fluorescence, the stratigraphy, the textures, the mineralogy, and the chemical compositions of the mural were established; therefore the painting techniques, pigments, and materials applied by the artist were identified. The mural was painted with the fresco technique and variations. This technique involves the use of materials of mineral origin, both in the support and for the pigments. About the artist’s relevance, Fulvio Pennacchi is considered an important muralist of his time, being one of the pioneers in the production of frescoes in Brazil. The mural, measuring approximately 11?×?6?m, painted in 1954, was removed from where it was originally made, in consequence of a fire that affected the place. Specialized engineers transported it, and today it is stored awaiting restoration. The data presented here can support the process of restoration of the mural, as well as contribute to the improvement of protocols for the analysis of works of art, and to the historical record of mural painting techniques over time. 相似文献
11.
《Communication monographs》2012,79(4):310-316
The mean length of verbalization of 56 four‐year‐old Head Start children was measured in four communication patterns—dyad, triad, small group, and role‐playing triad. The children produced more speech in the small group than in the dyad. Differences between other patterns were not significant. Similar results were obtained when repetitions of words and phrases were eliminated. Females produced, more speech than males in all communication patterns. 相似文献
12.
This investigation reported normative data for experienced (N = 20) and less‐experienced (N = 20) college teachers’ use of humor, self‐disclosure, and narrative activities. Results indicated that both groups of teachers observed in the study incorporated the three behaviors within their 50‐minute lectures. Experienced teachers, however, used humor, self‐disclosure, and narrative activities more frequently than the less‐experienced teachers. Additionally, the experienced teachers used the behaviors to clarify course content. 相似文献
13.
Reviewed by Doris Wisher 《Medical reference services quarterly》2013,32(4):402-403
The daily “Morning Report” is a fixture in many residency programs. In the past, librarians have attended this meeting and, in various ways, worked to enhance the resident learning experience. At the academic children's hospital discussed in this study, the concept was taken a step further. Together with the chief residents, the librarian provided a complete “learning package” consisting of the case write-up along with relevant, librarian-filtered, evidence-based information. The learning package was then e-mailed to all residents and some of the attending physicians. This program led to a huge increase in the use of library resources and services as well as a renewed recognition of the value of the library and the librarians. 相似文献
14.
Denise Haunani Solomon Mary Lynn Mille Williams 《Journal of Applied Communication Research》2013,41(3):196-216
Social‐sexual communication at work may contribute to either the initiation of an organizational romance or sexual harassment. We examined forces that influence perceptions of sexual messages as harassing rather than flirtatious. We presented 94 working adults with questionnaires soliciting workplace attitudes and experiences. Then, participants reviewed newsletters describing male and female coworkers in a fictitious organization. Finally, participants evaluated the degree of sexual harassment evident in six hypothetical interactions wherein one of the employees introduced in the newsletter makes a suggestive remark to his or her coworker. Newsletters and questionnaires manipulated the explicitness of messages, the initiator's status as supervisor versus subordinate, the attractiveness of the message initiator and target, and the initiator's sex. Message explicitness accounted for 88% of the variance in perceptions of harassment. A five‐way interaction among message and situational cues suggested that perceptions of sexual harassment are also influenced by contextual information. Females rated highly explicit messages as more harassing than did males, and individuals who were more accepting of socializing or dating between coworkers rated scenarios as less harassing. Exposure to socializing at work had a curvilinear association with perceptions of harassment such that low to moderate exposure corresponded with perceptions of greater harassment and moderate to high exposure was associated with lower ratings of sexual harassment. The discussion highlights applications for sexual harassment training programs within organizations. 相似文献
15.
As a growing number of disciplines adopt geospatial technologies in their research, the need for access to geospatial data, in a variety of formats, has grown dramatically. For librarians to meet this demand, we also need to provide preservation, curation, metadata, and discovery services. GeoHydra, our open source toolkit and set of practices, provides these services for Stanford's libraries. We incorporate a variety of geospatial content types from raster imagery to scientific vector data to georeferenced scanned maps, and provide a data model for repositories. We demonstrate the potential of a new architecture and practice for librarianship for geospatial data using the Hydra framework. The digitization and georeferencing of historic map collections, streamlining the acquisition and cataloging of vendor-supplied data, shared cataloging of geographic resources, and citation of geospatial research data are all examples of use cases that GeoHydra serves. Our metadata creation and management strategies implement the ISO (International Standards Organization) suite of geographic standards, and a specialized metadata schema for discovery. We developed XSLT transformations, auto-generation of core elements, unique URIs for place names, and cross-institutional data sharing. With these metadata we built a novel geoportal, EarthWorks, to provide end-user discovery for geospatial data layers using GeoBlacklight technology. 相似文献
16.
17.
18.
The article traces the career of Frederick G. Kilgour (1914–2006), who is widely recognized as one of the leading figures in 20th-century librarianship. He founded the Ohio College Library Center (OCLC) and from 1967 to 1981 was its first president and chief executive officer, presiding over OCLC's rapid growth from an intrastate network to an international network. In 1971, under Kilgour's leadership, OCLC introduced an online shared cataloging system and an online union catalog (WorldCat) that is today the world's foremost bibliographic database. In 1978, he created the OCLC Office of Research, and in 1979, under his direction, OCLC launched its online interlibrary loan system. The author of 205 scholarly papers, Kilgour received numerous awards and honors over the course a career that took him from Harvard University Library, to the Office of Strategic Services in World War II, to Yale Medical Library, to OCLC, and finally, to the University of North Carolina at Chapel Hill, where he spent his final years on the faculty of the School of Information and Library Science as a Distinguished Research Professor. 相似文献
19.
《Communication monographs》2012,79(3):173-250
Two studies tested the assumption that relational contexts affect the way people react to messages that hurt their feelings. In the first, the range of responses people have to hurtful messages was explored, and underlying dimensions reflecting the responses were identified. Participants’ reactions were characterized by three broad dimensions: active verbal responses (e.g., attacking the other, defending the self, asking for an explanation), acquiescent responses (e.g., crying, apologizing), and invulnerable responses (e.g., ignoring the message, laughing). Analyses indicated that people who felt extremely hurt tended to react more often by acquiescing than those who were less hurt. Abo, those who felt the impact of hurt on their relationship was relatively low responded more often with invulnerability than those who felt the impact was high. In the second study, the association between people's reactions to hurt and the quality of their relationship with the person who hurt them was examined, as was the influence of particular types of relationships (e.g., those between family members or romantic partners) on individuab’ responses to hurt. Among other findings, the results suggested that relational satisfaction was positively associated with active verbal responses and negatively correlated both with the degree of experienced hurt and the perceived impact of the hurtful message on the relationship. Further, hurtful messages from family members tended to elicit greater feelings of hurt than those from other people—regardless of the closeness, similarity, amount of contact, or level of satisfaction reported by respondents. By comparison, messages from romantic partners had a greater effect on participants’ relationships than did those from individuab involved in family or non‐family/non‐romantic relationships. 相似文献
20.
Brianna L. Lane 《Communication Studies》2018,69(3):294-303
Tong, Van Der Heide, Langwell, and Walther (2008) tested the relationship between the number of Facebook friends and impressions of the profile owner. They found the number of Facebook friends a person had influenced impressions of social attractiveness and extraversion, but not physical attractiveness, of the profile owner. The current study replicates their original study by experimentally testing for differences when the Facebook profile owner has 102, 302, 502, 702, or 902 friends. Results of the replication indicated no significant effect of the number of Facebook friends and impressions of social attractiveness or physical attractiveness. However, results did indicate significant differences in impressions of extraversion. Warranting theory is applied to aid in interpretation of results. 相似文献