1,721,032 research outputs found
Calibrating and modelling of statistical delay for signalized intersections at al-Nasiriyah city in Iraq
No full textEvaluating the performance of traffic flow in four intersections and two roundabouts in Petaling Jaya and Kuala Lumpur using Sidra 4.0 software
No full textDelays represent one of the indirect costs in terms of frustration, loss of time and discomfort to the drivers. On the other hand, it represents a direct cost in terms of fuel consumption/wastage on road networks during idleness and inactivity. Extreme delay at signalized intersections reflects the incompetence in the signal timing because of consecutive signalized intersections on the particular site. The traffic parameters performance is not a feasible method or practice. Furthermore, one of the significant ways to improve the performance of the network is by coordinating traffic signal in intersections. This study was done to highlight the ability of improving the level of service (LOS) of four intersectionstwo of them with four legs and two with three legs as well as two roundabouts in Kuala Lumpur and Petaling Jaya using SIDRA software version 4.0. In addition, the study aims to compare the results between each peak hour in terms of percentage of change in the variables and the delay. Moreover, consideration of geometric delay should be taken into account when comparing delays in peak hours in the morning and the evening peak hours. The results obtained show that the morning period is better than the evening period for the value of delay, queue, journey time and speed that was obtained from practical measuring in the study area. The average reduction of delay in the study area before and after optimization of SIDRA software is from 3489 Sec to 1571 Sec in the morning period as well as 5093 Sec to 1663 Sec in the evening period. The percentage of reduction was about 45% and 33% -respectively
Potensi penggantian tempurung kelapa sebagai agregat kasar dalam campuran asfalt panas
No full textTujuan kajian ini adalah untuk menentukan kesesuaian penggunaan tempurung kelapa bagi menggantikan agregat kasar
bersaiz 10 mm. Kajian ini dilakukan dengan menyediakan sampel kawalan dan juga sampel campuran pada peratusan
10, 20, 30, dan 40% daripada jumlah agregat mengikut piawaian Jabatan Kerja Raya (JKR). Pelbagai uji kaji dilakukan
bagi menguji tahap kekuatan dan kesesuaian penggunaan tempurung kelapa bagi menggantikan agregat di dalam turapan
boleh lentur. Ujian yang dilakukan ialah ujian reka bentuk campuran Superpave, dan untuk ujian prestasi ialah ujian
tegangan tidak langsung modulus, ujian rayapan dinamik dan ujian rayapan statik. Daripada ujian yang dijalankan
didapati tempurung kelapa sesuai dijadikan sebagai bahan ganti agregat pada peratusan kurang daripada 10% daripada
jumlah agregat bagi saiz 10 mm. Penggunaan tempurung kelapa di dalam kajian ini adalah bagi menjimatkan kos,
memandangkan kos agregat sekarang semakin meningkat sedangkan tempurung kelapa merupakan bahan yang boleh
didapati dengan muda
Development of bicycle shift models in Universiti Kebangsaan Malaysia Campus
No full textCycling is suitable for short trips and take shorter commute time for students who are living in the campus. Moreover, it
requires lower costs and can reduce environmental pollution. However, cycling in campus is not well received by the students.
This is due to certain factors such as hilly terrain, uncertain weather, and also the exposure to road traffi c accidents. A
survey had been conducted in UKM Bangi campus to identify the factors that can infl uence students to choose cycling as
the main choice of transport. Surveys were targeted to 170 respondents from the students in the campus. Two bicycle shift
models were developed based on travel distance of non-hilly terrain and travel distance if covered lane provided. 76.5%
of the respondent agreed that hilly terrain makes bicycle is not an option inside campus while 79.4% believe that the
weather condition makes them not to choose bicycle. From both model, it is seen that the probability to shift to bicycle is
increased as the travel distance increases if the terrain is not hilly and if there is covered lane provided. Overall, the study
is a success and might be useful for future research on sustainable transportation system in campus
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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