1,720,958 research outputs found
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
Inventory of Pollution Sources for The Lakes of Universiti Tun Hussein Onn Malaysia
Get PDFEutrophication impacts freshwater systems worldwide. Eutrophication may occur naturally, although human-caused causes are common. Human activities that release phosphorus and nitrogen cause anthropogenic eutrophication, which increases organic matter production. Lake eutrophication affects surface water globally. Water pollution may be assessed through point sources (PS) and non-point sources (NPS). PS is the intentional or inadvertent release of pollutants from industrial and wastewater facilities into waterways. PS is simpler to control than NPS due to rules and monitoring. Agriculture, urban development, and natural processes in the lake\u27s watershed may cause NPS pollution. Many causes cause NPS contamination, including precipitation, air deposition, infiltration, drainage, and watershed water flow variations. The pollution inventory activity has been carried out in several selected lakes at UTHM, specifically Tasik Kemajuan (in front of the G3 building), Tasik Teknologi (in front of Fakulti Kejuruteraan Awam dan Alam Bina, FKAAB), Tasik Teknologi (in front of Fakulti Pendidikan Teknikal dan Vokasional, FPTV), and Tasik Pembangunan (in front of Perpustakaan Tunku Tun Aminah, PTTA). Point and non-point pollution sources in the study\u27s area have been evaluated via a site investigation. The water discharge sources and considered pollutants entering the lake were analysed. The UTHM water flow plan is being studied for lake inflow sources. The PS pollutant inventory indicated that cafeteria wastewater and commercial building and faculty drainage systems pollute all lakes. Tasik Teknologi (FPTV) identified palm oil plantation water outflow as a pollutant source that can increase lake nutrient content. In all lakes studied, leaves, grass clippings, and other garden trash reached the water. Tasik Kemajuan, Tasik Teknologi (FKAAB), and Tasik Teknologi (FPTV) received water discharge from other lakes, transporting pollutants. This pollutant\u27s source assessment found most NPS from surface runoff. Road runoff contains several pollutants. Soil, leaves, and organic detritus are natural, while construction materials, exhausted particles, roadside waste, and fertilisers are manmade. Storm drains or surface runoff can carry these pollutants from roads to waterways. Residential and commercial stormwater runoff can transport fertiliser from lawns, gardens, and other well-maintained areas. Rainwater washes fertilisers into storm drains and lakes. Runoff can pollute streams and cause algae blooms. In conclusion, all pollutant sources that contributed to the eutrophication for Tasik Kemajuan, Tasik Teknologi (FKAAB), Tasik Teknologi (FPTV) and Tasik Pembangunan has been identified by conducting the pollutants sources inventory
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
Water Quality Monitoring for Trophic State of Tasik Kemajuan, Universiti Tun Hussein Onn Malaysia
Get PDFAquatic ecosystems offer several ecosystem services, including water purification, nutrient recycling, flood reduction, groundwater recharge, irrigation, and animal habitats. One of the most prevalent challenges freshwater systems face globally is eutrophication. Eutrophication refers to the process of increasing the concentration of plant nutrients in water. The Carlson\u27s Trophic State Index (CTSI) categorises an aquatic environment\u27s eutrophication condition. The parameters exclusively employ three water quality parameters, which are Secchi Disc Transparency (SD), Total Phosphorus (TP), and Chlorophyll-a (Chl-a). Biological indicators refer to living organisms, such as plants and macroinvertebrates, that are implemented to identify and assess the presence of pollutants within a specific ecosystem. Therefore, this study focuses on the determination of trophic state and the assessment of biological indicators of Tasik Kemajuan. Water samples were collected for nine weeks using the composite sampling method for laboratory analysis. Water transparency was determined using a Secchi Disc. The Chl-a was determined by using the determination of chlorophyll-a using 90% methanol and measuring the absorption using a Hach DR6000 UV VIS Spectrophotometer at 663 nm and 750 nm, while the Total Phosphorus was determined by using USEPA1 PhosVer® 3 with Acid Persulfate Digestion Method (Method 8190). Tasik Kemajuan exhibited eutrophic conditions over the duration of the nine-week period. The CTSI values exhibited a range of 60 to 80, thereby demonstrating that the water body under consideration is in a state of eutrophication. The Red Claw Crawfish (Cherax Quadricarinatus), Amona Prawn (Caridina Multidentata), Freshwater Snail (Viviparidae), Tiger Barb (Puntius Tetrazona), and Waterlily (Nymphaeaceae) are among the biological indicators found in Tasik Kemajuan. In conclusion, the analysis of the result shows that the Tasik Kemajuan is in an eutrophic condition, which has high amounts of algae growth, and the bottom waters are seriously depleted in oxygen.
Determination of Nitrogen, Phosphorus and Potassium in Soil and Plant Due to Husbandry Farming in Parit Rasipan Drainage System
Get PDFNutrient flow into waterways and soils has rapidly causing eutrophication, which causes ecological instability, dissolved oxygen (DO) depletion, extinction of aquatic species, and perhaps public health risks. Therefore, this study focuses on the determination of nitrogen, phosphorus, and potassium (NPK) in soil and plants in the Parit Rasipan drainage system due to the livestock farming area. The water quality of the drainage system is being monitored. Soil and plant at the study area have been collected by grid sampling method at 4 sampling points on wet and dry seasons for N determination using APHA 4500 NORG-B and PK using US EPA 6010B (ICP OES) methods, respectively. In addition, water quality has been monitored in situ for pH, DO, and temperature by a HI 98192 HANNA multiparameter instrument, while water samples were collected and analyzed for selected parameters including total nitrogen (TN), total phosphorus (TP) using the HACH DR6000 Spectrophotometer and potassium (K) by atomic absorption spectroscopy (AAS). The results of this study show that the concentrations of TN (3380–6290 mg/kg), TP (450-820 mg / kg) and K (381–931 mg/kg) in the soil are classified as moderate to very high. Due to the high concentration, TN (5270–6870 mg/kg), TP (262-769 mg / kg) and K (10200–16200 mg/kg) concentrations in plants are also high. For water quality monitoring, the data shows (pH 6.1-6.4), (DO 0.8–1.1 mg/L), and (temperature 26.6-29.2?C) both in wet and dry seasons. The concentrations of TN, TP and K (average ± s.d) concentrations in water during the wet season are (TN 43 ± 1mg/L), (TP 0.4 ± 1mg/L) and (K 3.9 ± 0.2mg/L) while during the dry season are (TN 49 ± 1mg/L), (TP 0.7 ± 1mg/L) and (K 4.2 ± 0.2mg/L). In conclusion, from the analysis of the results, the Parit Rasipan drainage system has a high level of NPK in both the wet and dry seasons due to the livestock activities in the area
Inventory of Pollution Sources for The Lakes of Universiti Tun Hussein Onn Malaysia
Get PDFEutrophication impacts freshwater systems worldwide. Eutrophication may occur naturally, although human-caused causes are common. Human activities that release phosphorus and nitrogen cause anthropogenic eutrophication, which increases organic matter production. Lake eutrophication affects surface water globally. Water pollution may be assessed through point sources (PS) and non-point sources (NPS). PS is the intentional or inadvertent release of pollutants from industrial and wastewater facilities into waterways. PS is simpler to control than NPS due to rules and monitoring. Agriculture, urban development, and natural processes in the lake\u27s watershed may cause NPS pollution. Many causes cause NPS contamination, including precipitation, air deposition, infiltration, drainage, and watershed water flow variations. The pollution inventory activity has been carried out in several selected lakes at UTHM, specifically Tasik Kemajuan (in front of the G3 building), Tasik Teknologi (in front of Fakulti Kejuruteraan Awam dan Alam Bina, FKAAB), Tasik Teknologi (in front of Fakulti Pendidikan Teknikal dan Vokasional, FPTV), and Tasik Pembangunan (in front of Perpustakaan Tunku Tun Aminah, PTTA). Point and non-point pollution sources in the study\u27s area have been evaluated via a site investigation. The water discharge sources and considered pollutants entering the lake were analysed. The UTHM water flow plan is being studied for lake inflow sources. The PS pollutant inventory indicated that cafeteria wastewater and commercial building and faculty drainage systems pollute all lakes. Tasik Teknologi (FPTV) identified palm oil plantation water outflow as a pollutant source that can increase lake nutrient content. In all lakes studied, leaves, grass clippings, and other garden trash reached the water. Tasik Kemajuan, Tasik Teknologi (FKAAB), and Tasik Teknologi (FPTV) received water discharge from other lakes, transporting pollutants. This pollutant\u27s source assessment found most NPS from surface runoff. Road runoff contains several pollutants. Soil, leaves, and organic detritus are natural, while construction materials, exhausted particles, roadside waste, and fertilisers are manmade. Storm drains or surface runoff can carry these pollutants from roads to waterways. Residential and commercial stormwater runoff can transport fertiliser from lawns, gardens, and other well-maintained areas. Rainwater washes fertilisers into storm drains and lakes. Runoff can pollute streams and cause algae blooms. In conclusion, all pollutant sources that contributed to the eutrophication for Tasik Kemajuan, Tasik Teknologi (FKAAB), Tasik Teknologi (FPTV) and Tasik Pembangunan has been identified by conducting the pollutants sources inventory
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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