1,720,981 research outputs found
The dynamics of mangrove forests in relation to die-back and human use in Bunaken National Park, North Sulawesi, Indonesia.
No full textAn Assessment of Mangrove Rehabilitation Programs in Bolaang Mongondow Selatan Regency, North Sulawesi
Full text linkWhile the results of many mangrove rehabilitation efforts have not been optimal due to various factors, the rate of mangrove forest deforestation remains high in Indonesia. This research was designed to test the principle “planting certain mangrove seedlings on suitable habitat would be survived”. The test was based on an assessment of six locations in Bolaang Mongondow Selatan Regency where mangrove rehabilitation programs were implemented. This assessment was conducted by using a spot check method to analyze any variables associated with plantation area feasibility, and the use of a participative approach to collect additional information. Results from this study confirmed that mangrove seedlings have to be planted on the right habitat and that the implemented rehabilitation programs have followed a try and error or speculative approach, and have not been supported by sufficient technical and theoretical competencies. Keywords: artificial plantation, natural regeneration, mangrove, rehabilitation Deforestasi hutan mangrove di Indonesia berlangsung cepat, sementara itu banyak upaya rehabilitasi belum memberikan hasil yang optimal karena berbagai faktor. Penelitian ini menguji secara khusus prinsip “benih yang ditanam di tempat yang cocok akan tumbuh”, melalui penilaian enam lokasi program rehabilitasi mangrove di Kabupaten Bolaang Mongondow Selatan. Penilaian dilakukan menggunakan metode pengecekan lapangan (on spot check) untuk menganalisis variabel-variabel yang berkaitan dengan kelayakan lahan tanam, dan pengumpulan informasi melalui pendekatan partisipatif. Hasil penelitian menegaskan bahwa “jenis bibit yang ditanam harus sesuai dengan lahan tanam”. Upaya penanaman yang dilakukan masih menggunakan pendekatan coba-coba atau spekulatif, dan tidak didukung pemahaman teknis maupun teoritis yang memadai
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
KONDISI LINGKUNGAN DAN STRUKTUR KOMUNITAS MANGROVE DI TELUK TOMINI, SULAWESI, INDONESIA
Full text linkMangrove di Teluk Tomini telah dieksploitasi terutama lahannya dikonversi menjadi tambak udang dan pohonnya ditebang untuk beragam tujuan. Dalam studi ini interpretasi terhadap peta dan citra satelit dilakukan untuk mendeskripsikan kondisi lingkungan intertidal dan proses-proses terkait dinamika pantai secara umum. Pada skala lokal, faktor fisiografik digunakan untuk mengklasifikasikan sub-habitat mangrove. Sebanyak 159 titik sampel dipilih untuk mengamati struktur vegetasi, dan klasifikasi dua-arah Specht yang telah direvisi untuk mangrove digunakan untuk mengelompokkan kelas struktur vegetasi. Kriteria kerusakan mangrove dikembangkan untuk mengklasifikasikan tingkat kerusakan. Wawancara dan pengamatan lapangan dilakukan untuk menilai keberhasilan program rehabilitasi. Hasil studi menunjukkan bahwa telah terjadi perubahan nyata pada vegetasi mangrove di Teluk Tomini, dan perubahan ini dapat mempengaruhi perkembangan dan regenerasi mangrove selanjutnya. Eksploitasi mangrove masih terus berlangsung, sementara kebanyakan program rehabilitasi mangrove tidak berhasil. Jika rencana pengelolaan berkelanjutan tidak dikembangkan, maka dikawatirkan kerusakan akan terus berlangsung dan meluas, dan mangrove di Teluk Tomini akan kehilangan fungsi ekologisnya.The mangroves in Tomini Gulf have been exploited for chiefly conversion of mangrove areas into shrimp cultivation and extraction of mangrove wood for various purposes. In this study, interpretation to available map and satellite images and ground check were conducted to describe intertidal environment conditions and general processes of coastal dynamic. At local scale, physiographic factors were used to classify mangrove sub-habitats. A total of 159 sample points were selected to observe structure of vegetation, and the revised two ways classification of Specht was applied to classify structural classification of vegetation. The criterion of mangrove disturbance was developed to classify disturbance level. Interview and field check were conducted to assess the successfulness of implemented rehabilitation programs. Results indicated that there were obvious changes in mangrove vegetation over much the intertidal environments, and these might influence the future development and regeneration of the mangroves. While most rehabilitation programs were unsuccessful, mangrove exploitations still continued. If a sustainable management plan is not developed, the degradation will continue and spread, and the mangrove will lose its ecological functions
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
Morfometri lereng kawasan sub-litoral pantai Malalayang II Kota Manado
Full text linkPemanfaatan pantai harus didukung oleh pemahaman yang baik tentang morfometri lereng ruang pantai tersebut. Penelitian ini dilakukan dengan tujuan untuk mendeskripsikan batimetri ruang dan pergerakan arus di kawasan sub-litoral Pantai Malalayang II, serta menganalisis kaitannya terhadap perubahan ruang pantai. Dengan menerapkan metode Lagrangian dan pengukuran kedalaman, diperoleh hasil bahwa ruang pantai bagian Barat memiliki perairan yang dangkal dibandingkan bagian Timur sehingga pergerakan arus relatif cepat di ruang tersebut. Analisis data batimetri menyimpulkan bahwa kawasan ini rentan terhadap erosi pantai, untuk itu disarankan adanya pembangunan pelindung pantai demi keamanan dan pengembangan pemukiman di kawasan Pantai Malalayang I
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