1,720,982 research outputs found
Aplikasi Infusum Daun Durian (Durio zibethinus) pada Proses Transportasi Benih Ikan Patin (Pangasius sp.) dengan Sistem Tertutup
Full text linkPenggunaan anestesi pada proses transportasi merupakan upaya dalam menjaga benih ikan sehat sampai tempat tujuan. Daun durian adalah salah satu bahan alami untuk anestesi karena mengandung senyawa metabolit sekunder. Tujuan penelitian ini mengetahui konsentrasi efektif infusum daun durian sebagai dasar perlakuan pada proses transportasi dan perbandingan pengenceran infusum dengan media air terhadap tingkat kelangsungan hidup, respon tingkah laku, dan kadar glukosa darah pada proses transportasi benih ikan patin dengan sistem tertutup. Rancangan acak lengkap lima perlakuan perbandingan pengenceran infusum daun durian dengan media air pengangkutan (kontrol (P1), 500:1500mL (P2), 1000:1000mL (P3), 1500:500mL(P4) dan (P5) infusum 2000mL) dengan tiga pengulangan. Konsentrasi efektif infusum daun durian yaitu 10% (100g daun durian dalam 1L air rebusan) dengan waktu induktif berbeda nyata dengan konsentrasi 20%, namun tidak berbeda nyata dengan konsentrasi 30% dan 40%. Sedangkan, waktu sedatif berbeda nyata dengan konsentrasi 40%, namun tidak berbeda nyata dengan konsentrasi 20% dan 30%. Kelangsungan hidup pada konsentrasi 10% mencapai 100%. Pasca transportasi diperoleh tingkat kelangsungan hidup tertinggi sebesar 83,33%, kenaikan kadar glukosa darah 54,67-80mg/dL dan respon tingkah laku dipengaruhi perbandingan pengenceran antara infusum daun durian dengan media air. Pada proses transportasi tertutup selama 16 jam, pengenceran infusum daun durian dengan media air 1000:1000mL sebagai perlakuan terbaik
Game-Based Multimedia for Horizontal Numeracy Learning
Full text linkRecently, game-based multimedia development has been increasing rapidly. Game-based multimedia is not only used for entertaining but also for teaching and learning process. Meanwhile, for the majority of elementary school students, numeracy learning is still considered as a difficult subject to be learned and has not attracted students’ interest because it still uses vertical methods. The objective of this research is to examine the implementation of game-based multimedia in learning horizontal numeracy. In this game-based multimedia, horizontal numeracy material is presented in the form of a game. Horizontal numeracy material begins with addition, subtraction, multiplication, and division. Game-based multimedia is implemented to 20 students in grade 3 elementary schools in Bandung, Indonesia. Subsequently, the way students learn the materials and their learning outcomes are explored after using this multimedia. The results show that the students can learn horizontal numeracy excitingly; moreover, they can easily understand the concept of horizontal numeracy quickly. It is indicated by by the increasing of average post-test value
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
Improving Students' Understanding of Energy Conservation through Training on Making Electrochemical Storage Devices
Full text linkThis paper reports the activities aimed at teachers and high school students in Lubuk Linggau, which went smoothly, interspersed with questions and answers. Demo and presentation, which are program activities, also run smoothly. The theme of community service activities is making a supercapacitor and battery and explaining the material used to make both energy storage devices. In addition, the team also presented basic knowledge about potentiostats and multimeters as test instruments related to electrochemistry. The activity went smoothly, interspersed with questions and answers—the demo and training have run smoothly. The theme of program activities includes the demo and training of preparing supercapacitor - batteries, explaining the materials - tools employed to make the energy storage devices. In addition, the team also presented basic knowledge about supercapacitors, batteries, potentiostats, and other tools related to electrochemistry. The activities of teachers and students at school took place very enthusiastically in receiving direction and counseling from the team. The enthusiasm can be seen in the active discussions between the team and members of these community groups. Group members feel the positive value of the activities carried out by the team. Generally, the team and participant can work out the ideas contained in the patent well. The team recommends some extended programs to propose, such as (a) similar activities should be carried out continuously to increase acknowledgment. (b) collaborating with others, and (c) developing online lab work.Tulisan ini melaporkan kegiatan yang ditujukan kepada guru dan siswa SMA di Lubuk Linggau, yang berjalan lancar, diselingi tanya jawab. Demo dan presentasi yang merupakan kegiatan program juga berjalan lancar. Kegiatan pengabdian masyarakat ini bertemakan pembuatan superkapasitor dan baterai serta menjelaskan bahan yang digunakan untuk membuat kedua alat penyimpan energi tersebut. Selain itu, tim juga mempresentasikan pengetahuan dasar tentang potensiostat dan multimeter sebagai alat uji yang berkaitan dengan elektrokimia. Kegiatan berjalan lancar, diselingi tanya jawab—demo dan pelatihan berjalan lancar. Tema kegiatan program meliputi demo dan pelatihan pembuatan superkapasitor - baterai, menjelaskan bahan - alat yang digunakan untuk membuat alat penyimpan energi. Selain itu juga disampaikan pengetahuan dasar tentang superkapasitor, baterai, potensiostat, dan bahan – alat lainnya yang berhubungan dengan elektrokimia. Kegiatan guru dan siswa di sekolah berlangsung sangat antusias dalam menerima arahan dan bimbingan dari tim. Antusiasme terlihat dari diskusi aktif antara tim dan anggota kelompok masyarakat tersebut. Anggota kelompok merasakan nilai positif dari kegiatan yang dilakukan oleh tim. Secara umum, ide-ide yang terkandung dalam paten dapat digarap dengan baik. Tim merekomendasikan beberapa program tambahan untuk diusulkan, seperti (a) kegiatan serupa harus dilakukan terus menerus untuk meningkatkan pengetahuan. (b) berkolaborasi dengan orang lain, (c) mengembangkan praktikum online
Connected Mathematics Project (CMP) Model Based on Presentation Media to the Mathematical Connection Ability of Junior High School Student
Full text linkConnection mathematics ability will be greatly needed by students, especially to solve the problems that need the relation between mathematical concepts with other concepts in mathematics and other disciplines or in everyday life. To get that mathematics ability in this research used Connected Mathematics Project (CMP) model based on Presentation Media. CMP model based on presentation media was a student-centered learning model that involved student more; student not only did the problem but also sought the solution actively that enabled student to explore the relation of mathematical concept in real life. This research was a quasi experiment research with the student of 7th grade of Junior High School of Ujungjaya 2 of Sumedang district, Indonesia as the research sample. After the learning in the experiment class was conducted, the data description by using instrument of pre-test and post-test were collected to find out the student’s ability of mathematical connection, as well as observation sheet to find out the activity and condition of student during mathematical learning. The result of the research showed that the student’s mathematical connection ability by using Connected Mathematics Project (CMP) model based on presentation media was better than the conventional one. Besides, student’s activity in the learning process by using Connected Mathematics Project (CMP) based on presentation media was really positive and they became very active. Keywords: connected mathematics project model, presentation media, mathematical connection ability
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
Analyses of Non-bonding Length, Partial Atomics Charge and Electrostatic Energy from Molecular Dynamics Simulation of Phospholipase A2 – Substrate
Full text linkAbstract: This paper reports molecular dynamics simulation of phospholipase A2 (PLA2)– substrate that has been done. Non-bonding length, partial atomic charge and electrostatic energy were used to evaluation the interaction between PLA2 and substrate. The research was subjected for three types of PLA2 of different sources, i.e, homo sapien, bovinus and porcinus, by using computer files of their molecular structures. The files with code 3elo, 1bp2, dan 1y6o were downloaded from protein data bank. Substrate structure can be found in 1y60 and was separated from its enzyme structure and docked into two other PLA2 structures for simulation purpose. Molecular dynamics simulations were done for 30000 steps with constant in number of molecules, volume and temperature (NVT). The results showed the existing of flip-flop mechanism as basic feature of PLA2 – substrate reactions. Interaction length analysis results indicated the presence of water molecules on the structures of 1bp2 and 3elo at the time of the simulation was completed. The existence of aspagine at the reaction site confirmed the theory that this amino acid is responsible for the survival of the reaction. the electrostatic energy increased substantially in the interaction after homo sapien PLA2 (3elo) and Bovinus (1bp2) with the substrate. Inverse effect took place in the PLA porcinus (1y6o).Keywords: flip flop, inflammation, in-silico, simulation Abstrak (Indonesian): Telah dilakukan penelitian tentang simulasi dinamika molekuler pada Situs Reaksi Phospholipase A2 (PLA2) dengan substratnya. Analisis panjang non-ikatan, muatan atom parsial dan energi elektrostatis digunakan untuk menilai interaksi antara PLA2 dan substratnya. Penelitian dilakukan pada tiga jenis sumber PLA2, yaitu homo sapien, bovinus dan porcinus dengan menggunakan file komputer untuk struktur molekul dengan kode 3elo, 1bp2, dan 1y6o. Pada file 1y60 terdapat struktur substrat yang dapat ditemukan secara alamiah. Kedua file lainnya tidak mengandung struktur molekul substrat. Simulasi dinamika molekul dilakukan untuk 30.000 langkah dengan konstan dalam jumlah molekul, volume dan suhu (NVT). Hasil penelitian menunjukkan keberadaan mekanisme flip-flop sebagai fitur dasar reaksi PLA2 - substrat. Hasil analisis panjang interaksi menunjukkan bahwa kehadiran molekul air pada struktur 1bp2 dan 3elo pada saat simulasi dilakukan. Keberadaan aspagine di lokasi reaksi menegaskan teori bahwa asam amino ini bertanggung jawab untuk kelangsungan hidup reaksi. energi elektrostatik meningkat secara substansial dalam interaksi setelah homo sapien PLA2 (3elo) dan Bovinus (1bp2) dengan substrat. efek terbalik terjadi di porcinus PLA (1y6o).Kata kunci: flip flop, inflamasi, peradangan, in-silico, simulas
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