1,720,959 research outputs found
Fixed bed pyrolysis of pulm seed waste for liquid oil production
No full textAmong various thermo-chemical conversion processes, pyrolysis is considered as an emerging technology for liquid oil production. The conversion of biomass waste in the form of plum seed into pyrolysis oil by fixed bed pyrolysis reactor has been taken into consideration in this study. A fixed bed pyrolysis has been designed and fabricated for obtaining liquid fuel from this plum seeds. The major component of the system are fixed bed pyrolysis reactor, liquid condenser and liquid collectors. The plum seed in particle form is pyrolysed in an externally heated 7.6 cm diameter and 46 cm high fixed bed reactor with nitrogen as the carrier gas. The reactor is heated by means of a biomass source cylindrical heater from 4000C to 6000C. The products are oil, char and gas. The reactor bed temperature, running time and feed particle size are considered as process parameters. The parameters are found to influence the product yield significantly. A maximum liquid yield of 39 wt% of biomass feed is obtained with particle size of 2.36-4.75 mm at a reactor bed temperature of 520oC with a running time of 120 minutes. The pyrolysis oil obtained at this optimum process conditions are analyzed for some fuel properties and compared with some other biomass derived pyrolysis oils and conventional fuels. The oil is found to possess favorable flash point and reasonable density and viscosity. The higher calorific value is found to be 22.39 MJ/kg which is higher than other biomass derived pyrolysis oils
Designee of a Scalable Database Management Systems (DBMS)
Full text linkScalable database management systems (DBMS)-both for update intensive application workloads as well as decision support systems for descriptive and deep analytics-are a critical part of the cloud infrastructure and play an important role in ensuring the smooth transition of applications from the traditional enterprise infrastructures to next generation cloud infrastructures. Though scalable data management has been a vision for more than three decades and much research has focused on large scale data management in traditional enterprise setting, cloud computing brings its own set of novel challenges that must be addressed to ensure the success of data management solutions in the cloud environment. This tutorial presents an organized picture of the challenges faced by application developers and DBMS designers in developing and deploying internet scale applications. Our background study encompasses both classes of systems: (I) for supporting update heavy applications and (II) for ad-hoc analytics and decision support. We then focus on providing an in-depth analysis of systems for supporting update intensive web-applications and provide a survey of the state-of-the-art in this domain. We crystallize the design choices made by some successful systems large scale database management systems, analyze the application demands and access patterns, and enumerate the desiderata for a cloud-bound DBMS
CARBON STOCK MEASUREMENT OF TREES AND DOCUMENTATION OF PLANT SPECIES AT SHER-E-BANGLA AGRICULTURAL UNIVERSITY CAMPUS
Full text linkA Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE
IN
AGROFORESTRY & ENVIRONMENTAL SCIENCE
SEMESTER: JULY-DECEMBER, 2020ABSTRACT
Carbon stock inside a vegetation plays a imperative part in relieving CO
2
and
assurance long-term soundness of carbon in changing situations. The study was
conducted to quantify the current carbon stock and documentation of plants in
different vegetation sites at Sher-e-Bangla Agricultural University, Bangladesh.
72 plots were purposively selected and divided into seven categories viz.
residential area, Horticulture and Agroforestry farm land, hall area, academic
area, Block plantation, pond side and roadside. Total 731 plants of 60 different
species under 32 families was recorded and 92, 360, 118, 41 and 120 plant
species were existed in terms of ornamental, fruit, timber, medicinal and
plantation crop, respectively. Academic area (229.06±20.31 Mg ha
) had the
highest mean carbon stock followed by Block plantation (191.00±48.60 Mg ha
1
), Hrt. & Afe. farm land (184.22±20.83 Mg ha
-1
), Roadside (163.46±22.73 Mg
ha
-1
), Hall area (157.27±14.32 Mg ha
-1
), Pond side (93.00±13.12 Mg ha
) and
Residential area (88.15±13.98 Mg ha
-1
). The five major carbon containing
species were Mangifera indica (102.53 Mg) followed by Artocarpus
heterophyllus (46.34 Mg), Swietenia mahagony (44.42 Mg), Polyalthia
longifolia (33.72 Mg) and Albizia lebbeck (19.94 Mg). Mango was found the
most predominant tree species with 18.33% (no. 134) followed by Kanthal
8.21% (no. 60), Mahogany 7.93% (no. 58), Narikel 6.84% (no. 50) and Supari
6.02% (no. 44). The mean diversity value of the study area was 1.36 (SWI).
Carbon stock had a positive relationship with basal area and mean DBH.
Anacardiaceae was the most dominating family with a number of 137 plants and
Oleaceae and Lythraceae were the least dominating family with a number of
single plant. 49.25, 42.54, 16.41, 16.28, 13.95, 12.58 and 5.61% plants were
recorded in fruit, resin plants, plantation crop, latex plants, timber, essential oil
plants and ornamental plants, respectively with a total number of 360, 311, 120,
119, 118, 102 and 92. The study shows that the tree species found in the campus
make an important contribution in conserving diversity and helps to maintain the
carbon stock at the University Campus.
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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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