1,721,132 research outputs found
Epimeria heldi, a new species of Amphipoda (Crustacea, Epimeriidae) from the Antarctic Ocean
No full textThe new amphipod species Epimeria heldi is described. It differs from all known eperimiids in the following combination of characters: apically rounded coxae 1-3, the characteristic sculptured coxal plate 4, the narrow basis 7 and uropod 3 rami apically rounded. The body colour of the living animal is grey, with dark red mouthparts and appendages, and yellow eyes
Epimeria (Hoplepimeria) heldi d'Acoz & Verheye 2017, subgen. nov.
No full textEpimeria (Hoplepimeria) heldi subgen. nov. Coleman, 1998 Epimeria heldi Coleman, 1998a: 17–25, figs 1–5. Epimeria heldi – Wakabara & Serejo 1999: 642 (key). — Coleman 2007: 39, figs 18a–b, colour plate 1f, map 9 (rhomb). Description Description based on illustrations of Coleman (1998a). ROSTRUM. Medium-sized, just overreaching tip of article 1 of peduncle of antenna 1, anteriorly weakly curved, ventrally straight, tip subacute in lateral view. EYE. Very large, narrowly elliptic. PEREION–PLEOSOME TOOTH PATTERN. Pereionites 1–5 smooth; pereionite 6 with weak mid-dorsal straight carina, pereionite 7 to pleonite 3 with low carina, each with median slight concavity and posterior corner bluntly angular; the carinae are strongly laterally compressed. COXAE 1–3. Scarcely carinate and apically broadly rounded. COXA 4. Anterodorsal border nearly straight (very slightly concave), anteroventral border weakly but distinctly concave, these two borders being joined by broad rounded angle (anterior corner), which is distinctly projecting forward; ventral corner forming a fairly narrow rounded projection; lateral carina present and projecting laterally (it appears as a low rounded lobe in dorsal view); at its deepest point the carina is very distant from the posteroventral border of the coxa; posteroventral border deeply concave. COXA 5. Broad, with rounded lateral projection pointing laterally. In dorsal view, the lateral projection of coxa 4 and 5 looks like a mirror version of each other, the unit coxa 4 + coxa 5 forming a low concave structure on each side of the body. COXA 6. Posteriorly broadly rounded, with very low projection arising from its surface (forming a very low rounded lobe in dorsal view). COXA 7. Posterior and ventral border strongly convex; transition between these borders indistinct. EPIMERAL PLATES 1–3. Posteroventral angle: rounded in plates 1–2, produced into a small tooth in plate 2 and into a medium-sized tooth in plate 3. UROSOME TOOTH PATTERN. Urosomite 1 with low rounded dorsal process; urosomite 3 with dorsolateral borders straight, distally forming a rounded lobe. TELSON. Cleft on 0.15; tips of lobes broadly rounded, notch broadly V-shaped. GNATHOPODS 1–2. Carpus and propodus broad; propodus not expanding distally, palm distinct. PEREIOPODS 5–7. Merus, carpus and propodus slender, dactylus medium-sized; basis of pereiopods 5–6 of normal width, with posteroproximal half forming a very low rounded projection; with posterodistal corner not produced; basis of pereiopod 7 narrow with posterior border straight, with posterodistal corner very bluntly angular, not projecting. Colour pattern Body and coxae whitish with a very faint dull purplish hue. Basis of pereiopods 5–7 pale dull purple. Antennae, other pereiopods, distal part of pereiopods 5–7 and tailfan dull brownish pink. Eyes pale yellow. Body length 52 mm. Distribution Northwest of Elephant Island. Said to have been collected at 60°54.60ʹ S, 55°45.90ʹ W at 235 m depth (RV Polarstern, PS42, ANT-XIV/2, stn 31) (Coleman 1998a). The coordinates of station 31 given by Kattner (1998) are slightly different and deeper: 60°53ʹ S, 55°47ʹ W to 60°54ʹ S, 55°57ʹ W, 443– 734 m. However, Coleman (pers. com.) informed us that the depth record given in his logbook is 230– 235 m. Remarks This highly characteristic species, which shares a number of character states with Epimeria georgiana and E. inermis, is presumably rare, as it was not found in the abundant Epimeria material from Elephant Island collected during the cruise ANT-XXIII/8. Epimeria heldi is tentatively assigned to the subgenus Hoplepimeria subgen. nov. based on morphological assessment only.Published as part of d'Acoz, Cédric d'Udekem & Verheye, Marie L., 2017, Epimeria of the Southern Ocean with notes on their relatives (Crustacea, Amphipoda, Eusiroidea), pp. 1-553 in European Journal of Taxonomy 359 on pages 83-84, DOI: 10.5852/ejt.2017.359, http://zenodo.org/record/385569
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
PENGARUH PENGGUNAAN MEDIA STRIP STORY TERHADAP EFEKTIVITAS PEMBELAJARAN AL-QUR’AN HADIS DI KELAS VIII MADRASAH TSANAWIYAH DAREL HIKMAH PEKANBARU
Full text linkABSTRAK
Heldi Firma, (2020): Pengaruh Penggunaan Media Strip Story terhadap
Efektivitas Pembelajaran Al-Qur'an Hadis di Kelas
VIII Madrasah Tsanawiyah Darel Hikmah Pekanbaru.
Penelitian ini terdiri dari dua variabel, yaitu penggunaan media strip story
sebagai variabel X (variabel bebas/independen) dan efektivitas pembelajaran alQur'an Hadis sebagai variabel Y (variabel terikat/dependen). Penelitian ini
bertujuan untuk mengetahui apakah ada pengaruh yang signifikan penggunaan
media strip story terhadap efektivitas pembelajaran al-Qur'an Hadis di Kelas VIII
Madrasah Tsanawiyah Darel Hikmah Pekanbaru. Subjek penelitian ini adalah
siswa Madrasah Tsanawiyah Darel Hikmah Pekanbaru sedangkan objeknya
adalah penggunaan media strip story terhadap efektivitas pembelajaran al-Qur'an
Hadis di Kelas VIII Madrasah Tsanawiyah Darel Hikmah Pekanbaru. Populasi
dalam penelitian ini adalah seluruh siswa di Madrasah Tsanawiyah Darel Hikmah
Pekanbaru yang berjumlah 245. Sampel dalam penelitian ini adalah siswa kelas
VIII A2 dan VIII A3 yang berjumlah 61 orang. Teknik pengambilan sampel data
menggunakan teknik sampling proporsional. Pengumpulan data dalam penelitian
ini menggunakan angket, tes, observasi dan dokumentasi. Teknik analisis datanya
menggunakan kolerasi product moment dengan bantuan SPSS ver. 23 for
windows. Berdasarkan pengolahan data terdapat pengaruh yang signifikan, dengan
perolehan indeks 0,398 pada taraf signifikan 5% = 0,252 maupun pada taraf
signifikan 1% = 0,327. Ini berarti r hitung lebih besar dari r tabel yang dapat
digambarkan sebagai berikut 0,252 0,327. Dengan demikian H0 ditolak
dan Ha diterima. Hal ini berarti bahwa ada pengaruh yang signifikan penggunaan
media strip story terhadap efektivitas pembelajaran al-Qur'an Hadis di kelas VIII
Madrasah Tsanawiyah Darel Hikmah Pekanbaru.
Kata Kunci: Penggunaan Media Strip Story, Efektivitas Pembelajaran AlQur'an Hadi
KONTRIBUSI TINGKAT DISIPLIN BELAJAR DAN KETEPATAN METODE MENGAJAR TERHADAP SIKAP BELAJAR SISWA PADA MATA PELAJARAN PENDIDIKAN AGAMA ISLAM SEKOLAH MENENGAH ATAS NEGERI 1 BANGKINANG KOTA-KAMPAR
Full text linkABSTRAK
Heldi Firma, (2023): Kontribusi Tingkat Disiplin Belajar dan Ketepatan Metode Mengajar terhadap Sikap Belajar Siwa pada Mata Pelajaran Pendidikan Agama Islam Sekolah Menengah Atas Negeri 1 Bangkinang Kota-Kampar.
Penelitian ini bertujuan untuk mengetahui kontribusi tingkat disiplin belajar dan ketepatan metode mengajar terhadap sikap belajar siswa pada Mata Pelajaran Pendidikan Agama Islam Sekolah Menengah Atas Negeri 1 Bangkinang Kota-Kampar. Penelitian ini adalah penelitian lapangan dengan pendekatan kuantitatif. Sampel penelitian ini adalah siswa Sekolah Menengah Atas Negeri 1 Bangkinang Kota-Kampar sebanyak 299 siswa. Teknik pengumpulan data menggunakan Observasi, angket dan dokumentasi. Teknik analisis data menggunakan regresi linier dan berganda. Hasil penelitian ini menunjukkan bahwa tingkat disiplin belajar memiliki kontribusi yang signifikan terhadap sikap belajar siswa pada Mata Pelajaran Pendidikan Agama Islam Sekolah Menengah Atas Negeri 1 Bangkinang Kota-Kampar. Hal ini ditunjukkan dengan hasil r hitung lebih besar dari r tabel (0,464 > 0,113) dengan nilai sig. 0,000 0,113) dengan nilai sig. 0,027 F tabel (42,558 > 3,03) dengan besar konribusi 22,3%. Ini berarti sumbangan variabel independen terhadap variabel dependen sebesar 22,3%. Sedangkan sisanya sebesar 77% disumbangkan oleh variabel lain yang tidak dibahas dalam penelitian ini.
Kata Kunci: Tingkat Disiplin Belajar, Ketepatan Metode Mengajar, Sikap Belaja
Pembuatan Adsorben Silika Gel, Silika-Selulosa Hibrid, Silika Surfaktan, dan Penyerapan Tartrazin-Rhodamin B di Permukaan
No full textPEMBUATAN ADSORBEN SILIKA GEL, SILIKA-SELULOSA HIBRID, SILIKA SURFAKTAN, DAN PENYERAPAN TARTRAZIN-RHODAMIN B DI PERMUKAAN Moch. Heldi Prastyo, Surjani Wonorahardjo, dan Anugrah Ricky Wijaya Jurusan Kimia, FMIPA, Universitas Negeri Malang Email: [email protected] ABSTRAK : Silika gel dapat dipreparasi dari abu sekam padi menggunakan metode sol-gel dengan pelarut NaOH dan asam sulfat. Untuk membuat adsorben yang lebih baik, silika gel dipadu dengan selulosahasil hidrolisis nata de coco melalui proses gellingdan silika yang dipadu dengan surfaktan sehingga diperoleh adsorben silika-selulosa dan silika surfaktan.Hasil karakteristik menunjukkan kadar air, kadar abu, dan daya serap iod silika-selulosa hibrid lebih baik dibandingkan dengan silika gel maupun silika surfaktan. Pada uji BET, luas permukaan silika gel lebih besar dibandingkan kedua adsorben. Penelitian menghasilkan adsorben yang efektif memisahkan zat warna seperti tartazin dan rhodamin B. Surfaktan bertindak sebagai molekul pengarah yang dapat menyeragamkan ukuran pori, sehingga adsorben silika surfaktan lebih baik dalam menfadsopsi tartrazin-rhodamin B. Persentase tartrazin-rhodamin B teradsorpsi dipengaruhi oleh konsentrasi dan suhu adsorbat. Proses pemisahan dengan eluen surfaktan menghasilkan pola pemisahan yang baik terhadap campuran tartrazin-rhodamin B. Kata kunci: silika gel, silika-selulosa, surfaktan, adsorpsi, tartrazin-rhodamin
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
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