1,720,965 research outputs found
Tea As The Best Medium For The Growth of Kombucha
No full textThis task is a substitute task for the final semester exam in 2022 with lecturer Muhammad Nazri Janra, M.Si, M.A. This paper concerns the science of microbiology and biochemistry which discusses what media is best for the growth of kombucha. Kombucha is a fermented product using Acetobacter bacteria and several types of yeast as the starter. The medium used is quite diverse, such as tea water, rosella, guava leaves, betel leaves, cocoa powder solution and many more. Each medium has a different chemical content that affects the growth of kombucha. This discussion is quite interesting to me because this topic combines microbiology with biochemistry. In addition, many people, including me, still don't know much about kombucha so the discussion of this topic is quite new and not many have reviewed it, even though kombucha has a myriad of benefits especially for health
INVENTORY OF DRAGONFLIES AND DAMSELFLIES (ODONATA) IN ANDALAS UNIVERSITY’S LIMAU MANIS CAMPUS COMPLEX, PADANG: USING PHOTOGRAPHICAL APPROACH
Full text linkOdonata, which consists of true dragonflies and damselflies, is considerably understudied in Sumatra, especially in West Sumatra region. While the campus area of Andalas University in Limau Manis provides many suitable habitats for dragonflies and damselflies, the least has been done in learning these organisms. In this paper, we intend to conduct the inventory of Odonata in Limau Manis area by using photography approach (by taking decent pictures only, without sampling the animal). After spending 14 days of data collection which spanned from October 2017 until February 2018), we listed 27 Odonata species. Of which, 11 species belong to four families under suborder Zygoptera and 16 species grouped into four families under suborder Anisoptera. Libellulidae is a family under Anisoptera that was found with most species members. Photography approach promises an immense help in doing species inventory for this animal group for its reliability in determining species identification without harming species’ population.
Keywords: damselflies, dragonflies, Libellulidae, Limau Manis area, photography approac
Otters - fish-farmers Conflicts in Padang Pariaman Regency, West Sumatra, Indonesia
No full textOtters are regarded as pest by fish farmers in West Sumatra, Indonesia. However, the data on otter-fish farmer conflicts are not yet scientifically gathered. In this study we gathered the data on the conflicts which deemed important for formulating the conservation actions. We prepared questionnaires for the field staffs in the fisheries office in Padang Pariaman Regency, who supervise around 100 groups of fish farmers. We inquired the field staffs to apply the questionnaire during their visits at each group. Total 52 farmer groups returned the questionnaire. As many as 63.46% of the farmer groups’ fishponds ever visited by otters, where 18.18% of them visited within the previous month. Fish farmers commonly thought there were two otter species, yet they could not confidently identify which species they encountered. Otters visited fishponds from afternoon to early morning, with most visitations happened during midnight. Fish farmers indicated that otters came to fishponds when rain condition in 68.42% occasions. As many as 21.15% fish farmers (11 groups) mentioned catching and killing as methods to mitigate the disturbance by otters. Upon killed, otter carcasses were disposed as redeemed worthless. Despite the common perception on otters was negative, the fish farmers are willing to learn any method for fish farming that economically benefit for human, yet ecologically friendly for otter. We discussed further potential methods to harmlessly protect fish ponds from otters
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
Utilization of Ultrasonic Waves for Insect Control: A Systematic Review and Meta-Analysis
No full textUltrasonic waves refer to sound waves with a frequency higher than the upper limit of human hearing. Ultrasonic waves are currently being explored to control insect pests. The idea is to use ultrasonic frequencies that are annoying or unpleasant to certain insects, causing them to die, become damaged, change their behavior, or avoid certain areas.
Different insects may respond to ultrasonic frequencies differently. Ultrasonic frequencies ranging from 20 to 65 kHz are often studied for insect control, if not more. The effectiveness of ultrasonic devices in controlling insects can be limited by factors such as the type of insect, the surrounding environment, and the range and device of the ultrasonic waves
Some additional records to the inventory of dragonflies and damselflies (Odonata) in Andalas University’s Limau Manis campus complex, Padang, West Sumatra
Full text linkSince the publication of inventory list for dragonflies and damselflies within the boundary of Andalas University’s Limau Manis Campus Complex, Padang, on 2018, the survey efforts have been continuously conducted. Hence, in this article we add five odonate species new for Andalas University’s Limau Manis Campus Complex, with one species Drepanosticta cf. bispina may require further investigation and elaboration on its existence in West Sumatra. We also corrected the identification of Heliocypha fenestrata into H. angusta angusta. With this addition, Andalas University’s Limau Manis Campus Complex currently resides for 32 species and 9 families of Odonata, increasing from previously 27 species and 8 families
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