1,720,960 research outputs found
Sustainable management of the Salalah coastal aquifer in Oman using an integrated approach
No full textMost of the coastal areas around the globe depend on coastal aquifers vulnerable to salt water intrusion. The Salalah plain in southern Oman is underlain by a shallow limestone aquifer extending north up to the foot of the Jabal AlQara which reach a height of about 1000 m. A major part of the recharge to the aquifer is through fog condensation on the forest on the upper slopes of the mountain. Increasing population and water use for agriculture has caused limited salt-water intrusion. There is an urgent need for management of the aquifer to avoid further intrusion. A numerical flow model was developed for the Salalah coastal aquifer using both the MODFLOW and the MT3DMS computer codes to study the present water flow and future water turnover, the latter under different scenarios. The fog collecting forest is under threat due to the browsing of herds of camels. Recharge of treated wastewater is a management measure already in operation. Other management options considered, are restrictions on the use of water in irrigation and improvements in irrigation practices. Still another measure is reforestation of Jabal AlQara.QC 2010081
The smash of Parthenium hysterophorus L. in the grasslands of Oman
Full text linkThis study examines the invasiveness of Parthenium hysterophorus L. considered as harmful, unpleasant noxious invasive weed in Sultanate of Oman. Since the subject of investigation has allelopathic effects, the author’s objective is to identify its abundance, its impact to environment, human and animal health. Allelopathy of this invasive weed has started to be known and considered by the farmers and harvesters. The harmful and socio-economic effects of the weed to humans, animals and to landscape are not fully known nor understood by the local farmers and pastoralists in the southern part of Oman where this weed is most invasive. Data were collected through field observation, informal interviews, focus group discussions and survey questionnaire. They were treated and analysed using descriptive statistics. Findings prompted the participants to propose possible and practical control solutions for the spread of P. hysterophorus if not totally eradicated, considering the availability of resources, level of awareness and the socio-economic status of the affected regions. The results of the investigation are hoped to improve the over-all management that are being conducted by the concerned agencies and volunteers towards the rapid spread of the weed. The findings revealed that P. hysterophorus has serious impacts on vegetation, pastures and agriculture, as it was observed in reduced level growth of both plants and trees. The possible control measures gathered from the participants indicate that they are willing to cooperate and learn more about the impact of the weed
Sustainable management of the Salalah coastal aquifer in Oman using an integrated approach [Elektronisk resurs]
No full textMost of the coastal areas around the globe depend on coastal aquifers vulnerable to salt water intrusion. The Salalah plain in southern Oman is underlain by a shallow limestone aquifer extending north up to the foot of the Jabal AlQara which reach a height of about 1000 m. A major part of the recharge to the aquifer is through fog condensation on the forest on the upper slopes of the mountain. Increasing population and water use for agriculture has caused limited salt-water intrusion. There is an urgent need for management of the aquifer to avoid further intrusion. A numerical flow model was developed for the Salalah coastal aquifer using both the MODFLOW and the MT3DMS computer codes to study the present water flow and future water turnover, the latter under different scenarios. The fog collecting forest is under threat due to the browsing of herds of camels. Recharge of treated wastewater is a management measure already in operation. Other management options considered, are restrictions on the use of water in irrigation and improvements in irrigation practices. Still another measure is reforestation of Jabal AlQara.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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