1,720,956 research outputs found
Remediation Of Lead and Cadmium Contaminated Soil Using Fly Ash and Organic Materials
Full text linkAgricultural soils that are close to industrial areas are prone to be polluted by lead (Pb) and cadmium (Cd) caused by industrial waste. Soil remediation is a method to clean the soil from pollutant materials. Utilizing fly ash and organic matter is a way to reduce levels of Pb and Cd pollution in the soil. This research was conducted to study the effect of ameliorants on reducing the availability of Pb and Cd in soil. The greenhouse experiment was carried out using a randomized block design with the application of 3 types of ameliorants, namely fly ash, chicken manure, and cow manure. The experimental design was prepared with 2 dose levels, namely C: control; F1: 450g; F2: 600g; A1: 75g; A2: 105g; S1: 105g; S2: 135g; FAS1: 450 g+75 g+105 g; FAS2: 600g+105g+135g. Each treatment was repeated 3 times to obtain 27 experimental units. The experimental results showed that the effect of the treatment of fly ash, chicken manure, and cow manure significantly increased soil pH, KB, C-organic, and exchangeable bases as well as reduced levels of availability of Pb and Cd compared to controls. The use of single fly ash (F1 and F2) reduces the availability of Pb in the soil, while the available Cd decreased in the application of a combination of fly ash with chicken and cow manure (FAS1 and FAS2). The application of fly ash alone was able to reduce the availability of Pb and Cd which was higher than of chicken manure and cow manure alone. However, the provision of fly ash has not been able to increase the growth of kale plants.
Keywords: Cd, fly ash, chicken manure, cow manure, Pb, remediationTanah lahan pertanian yang berada dekat dengan kawasan industri rentan tercemar oleh timbal (Pb) dan cadmium (Cd), disebabkan oleh limbah industri tersebut. Remediasi tanah merupakan Upaya yang dilakukan untuk membersihkan tanah dari bahan-bahan pencemar. Pemanfaatan fly ash dan bahan organik merupakan salah satu cara untuk mengurangi kadar pencemaran Pb dan Cd dalam tanah. Penelitian dilakukan untuk mempelajari pengaruh dari amelioran untuk menurunkan kadar ketersediaan Pb dan Cd pada tanah. Percobaan rumah kaca dilakukan dengan rancangan acak kelompok dengan perlakuan aplikasi 3 jenis amelioran, yaitu fly ash, pupuk kandang ayam dan pupuk kandang sapi. Rancangan percobaan disusun masing-masing dengan 2 taraf dosis, yaitu C: kontrol; F1: 450 g; F2: 600 g; A1: 75 g; A2: 105 g; S1: 105 g; S2: 135 g; FAS1: 450 g+75 g+105 g; FAS2: 600 g+105 g+135 g. Setiap perlakuan diulang sebanyak 3 kali sehingga diperoleh 27 satuan percobaan. Hasil percobaan menunjukkan pengaruh pemberian perlakuan fly ash, pupuk kandang ayam dan pupuk kandang sapi secara nyata meningkatkan pH, KB, C-organik, dan basa tanah serta menurunkan kadar ketersediaan Pb dan Cd dibandingkan dengan kontrol. Penggunaan fly ash tunggal (F1 dan F2) menurunkan kadar ketersediaan Pb pada tanah, sedangkan Cd tersedia menurun pada pemberian aplikasi kombinasi fly ash dengan pupuk kandang ayam dan sapi (FAS1 dan FAS2). Pemberian fly ash saja mampu menurunkan kadar ketersediaan Pb dan Cd yang lebih tinggi dibandingkan dengan pemberian kotoran ayam dan kotoran sapi saja. Namun, pemberian fly ash belum mampu meningkatkan pertumbuhan tanaman kangkung.
Kata kunci: Cd, fly ash, pupuk kandang ayam, pupuk kandang sapi, Pb, remedias
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
Effectiveness of Goat Manure and Liquid Organic Fertilizer in Increasing The Growth and Production of Cucumber (Cucumis sativus L.)
No full textThis study aims to analyze the effect of goat manure and liquid organic fertilizer on the growth and yield of cucumber plants. This research was conducted in the Experimental Garden of the Faculty of Agriculture, Syiah Kuala University using a Randomized Group Design (RAK) factorial pattern with two factors: the dose of goat manure consists of 4 levels, namely: K0: Without goat manure (0 ton/ha), K1: 10 tons/ha, K2: 20 tons/ha, K3: 30 tons/ha. The liquid organic fertilizer factor consists of 4 levels, namely P0: Without liquid organic fertilizer (0 ml/liter of water), P1: 5 ml/liter of water, P2: 10 ml/liter of water, and P3: 15 ml/liter of water. The parameters observed consisted of plant height, fruit number, fruit diameter, fruit length, and fruit weight. The results showed that the application of goat manure had a significant effect on plant height (15, 30, and 45 HST) and fruit length, but had no significant effect on fruit diameter, fruit number, and fruit weight. In contrast, the application of liquid organic fertilizer, either singly or in interaction with goat manure, showed no significant effect on all parameters observed. This study concludes that goat manure is effective in increasing plant growth
Peningkatan pemahaman dan kesadaran siswa SMK SPP SNAKMA Muhammadiyah Tanjung Anom tentang dampak pemanasan global melalui metode focus group discussion
No full textAbstrak Kegiatan pengabdian kepada masyarakat di SMK SPP Snakma Muhammadiyah Tanjung Anom bertujuan untuk meningkatkan pemahaman siswa tentang pemanasan global dan perannya dalam mitigasi perubahan iklim. Saat ini, permasalahan utama yang dihadapi adalah kurangnya pemahaman siswa tentang dampak pemanasan global, rendahnya kesadaran tentang pengurangan sampah plastik sekali pakai, dan terbatasnya kesempatan untuk mengikuti pelatihan mitigasi perubahan iklim. Sebagai solusinya, akan disampaikan program edukasi interaktif menggunakan media visual, seperti video dokumenter dan infografis, untuk membantu siswa lebih memahami dampak pemanasan global. Kegiatan dilaksanakan dengan metode Focus Group Discussion (FGD) untuk menggali isu-isu pemanasan global dan merumuskan langkah-langkah praktis yang dapat diterapkan di sekolah dan kehidupan sehari-hari, seperti mengurangi plastik sekali pakai, menanam pohon, dan menghemat energi. Hasil diskusi akan dipaparkan untuk menumbuhkan komitmen bersama di antara siswa untuk mendukung pelestarian lingkungan. Selain itu, siswa akan berpartisipasi dalam kegiatan di dunia nyata, termasuk pengurangan sampah plastik, penanaman pohon, dan kampanye kesadaran lingkungan, untuk membantu membangun kebiasaan positif. Melalui pendekatan berbasis teknologi, siswa diharapkan memperoleh pemahaman yang lebih mendalam tentang jejak karbon dan dampak lingkungan dari aktivitas manusia. Hasil yang diharapkan mencakup peningkatan kesadaran dan pemahaman siswa, serta terbitnya jurnal SINTA 4 yang akan bermanfaat bagi masyarakat luas dan membantu membentuk generasi muda yang sadar lingkungan. Kata kunci: pemanasan global; mitigasi perubahan iklim; focus group discussion AbstractThe community service activity at SMK SPP Snakma Muhammadiyah Tanjung Anom aims to enhance students' understanding of global warming and their role in mitigating climate change. Currently, the main issues faced include a lack of understanding among students about the impacts of global warming, low awareness regarding the reduction of single-use plastic waste, and limited opportunities for training in climate change mitigation. As a solution, an interactive educational program using visual media, such as documentary videos and infographics, will be delivered to help students better understand the impacts of global warming. The activity was implemented using the Focus Group Discussion (FGD) method to explore global warming issues and formulate practical steps that can be applied at school and daily life, such as reducing single-use plastics, planting trees, and conserving energy. The results of the discussions will be presented to foster a shared commitment among students to support environmental conservation. In addition, students will participate in real-life activities, including plastic waste reduction, tree planting, and environmental awareness campaigns, to help establish positive habits. Through a technology-based approach, students are expected to gain a deeper understanding of carbon footprints and the environmental impact of human activities. The expected outcomes include improved student awareness and understanding, and a SINTA 4 journal publication that will benefit the wider community and help shape an environmentally conscious younger generation. Keywords: global warming; climate change mitigation; focus group discussio
- …
