1,721,054 research outputs found
Model Penduga Biomassa di atas Permukaan Tanah Hutan Tanaman Jenis Ekaliptus (Eucalyptus grandis) Umur 7 Tahun pada HTI PT Toba Pulp Lestari, Tbk
No full textJULIANI PARDOSI. Model Penduga Biomassa di atas Permukaaan
Tanah Hutan Tanaman Tanaman Jenis Ekaliptus (Eucalyptus grandis) Umur 7
Tahun pada HTI PT Toba Pulp Lestari, Tbk. Dibimbing oleh ONRIZAL dan
NURDIN SULISTIYONO.
Penelitian ini bertujuan untuk memperoleh model allometrik hubungan
antara biomassa batang, cabang dan daun dengan dimensi pohon (diameter dan
tinggi) pohon Eucalyptus grandis umur 7 tahun72 HalamanSkripsi Sarjan
Pendugaan Cadangan Karbon Hutan Tanaman Eucalyptus grandis Tahun Tanam 2004 dan 2005 di Areal HPHTI PT TPL Sektor Aek Nauli menggunakan Citra Landsat TM
No full textNORA V. BUTARBUTAR: Estmating Carbon Stock 0f Eucalyptus grandis
planted in 2004 and 2005 in HPHTI PT TPL Sector Aek Nauli Using Landsat
TM, supervised by Nurdin Sulistiyono and Onrizal
Information of forest stand ability in carbon sequestration is vital in order
to climate mitigation, specially for global warming. The aim of this research is to develop the spasial model of carbon stock of planted Eucalyptus grandis forests using Landsat TM. The model was developed using statistical approach based on relationship between the digital number of remotely sense data and carbon stock was estiamted by allometrik equation in each sample plot. The result of the researh show that the best model is Y = 23.512 Log B – 29.167, R2 = 9.5 %. The average carbon stock in planted stand, 3.38 ton/ha and 4.28 ton/ha in planted stand of 1 and 2 age years old. The research concludes that remotely sensed data Landsat TM could be used for estimating above-ground carbon stock of E. grandis stand.65 halamanSkripsi Sarjan
Karakteristik Tapak Hutan Mangrove di Desa Kayu Besar Kecamatan Bandar Khalipah Kabupaten Serdang Bedagai
No full textLuas mangrove di Indonesia mencapai 75% dari total mangrove di Asia
Tenggara, atau sekitar 27% dari luas mangrove di dunia. Kekhasan ekosistem
mangrove Indonesia adalah memiliki keragaman jenis yang tertinggi di dunia.
Sebaran mangrove di Indonesia terutama di wilayah pesisir Sumatera, Kalimantan,
dan Papua (Dahuri, 2002 dalam Haroen, 2002).
Mangrove sebagai salah satu komponen ekosistem pesisir memegang
peranan yang cukup penting, baik dalam memelihara produktifitas perairan pesisir
maupun dalam menunjang kehidupan penduduk di wilayah pesisir. Bagi wilayah
pesisir, keberadaan hutan mangrove, terutama jalur hijau di sepanjang
pantai/pinggir muara sungai sangatlah penting untuk mensuplai kayu bakar, nener
ikan dan udang serta mempertahankan kualitas ekosistem pertanian, perikanan dan
pemukiman yang berada di belakangnya dari gangguan abrasi, intrusi air laut dan
angin laut yang kencang (Onrizal, 2002).
Ekosistem mangrove juga merupakan suatu kawasan ekosistem yang rumit,
karena terkait dengan ekosistem darat dan ekosistem lepas pantai diluarnya. Oleh
kerena itu hutan mangrove dapat dikatakan sebagai peralihan ekosistem, yang
menghubungkan daratan ke arah pedalaman serta pesisir muara. Banyak jenis
hewan dan jasad renik yang berasosiasi dengan hutan mangrove.79 HalamanSkripsi Sarjan
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
Keanekaragaman dan Kelimpahan Kepiting Bakau (Scylla spp.) pada Hutan Mangrove di Kawasan Sungai Serapuh Kecamatan Tanjung Pura Kabupaten Langkat
No full textMEYLAN P SIHOMBING: Abundance and Diversity of Mangrove Crab
(Scylla spp.) On the River Mangrove Forest Area as fragile as Tanjung Pura
Langkat District. Under the guidance ONRIZAL and ALEX TERNALA BARUS
River region as fragile as a district of Tanjung Pura Langkat mangrove
forests on both sides of the river encountered mud crab (Scylla spp.). However,
due to conversion of land into oil palm plantation and aquaculture area of
distribution reduced the mangrove crab. This study aims to measure the diversity
and abundance of mud crab (Scylla spp.) Under various conditions of forest
stands of mangrove and identify the factors that influence the spread of mud crab
(Scylla spp.) In the mangrove forest located in the River as fragile. This research
was conducted from February-March 2010 in the area of mangrove forest in the
River District as fragile as Tanjung Pura Kabnupaten Rare. Defined seven
stations and is divided into two sub-stations.
Results Measurement of Physical-Chemical Parameters of Water and
Substrate on the River area of mangrove forests as fragile as follows: the average
water temperature ranged from 28.00 to 29.00 ◦ C, the average pH of water
ranged from 6.80 to 7.00, average average pH of the substrate ranged from 4.90
to 5.40, the average water salinity ranged from 15.00 to 22.30 ‰, the average
salinity of the substrate ranged from 18.50 to 19.50 ‰, and average water depth
of about 13 0.10 to 42, 50 ‰. Substrate bottom waters in this region are classified
in terkstur mud. The highest density of mangrove species at station III
pohonadalah level of 1200-1500 ind / ha. Average litter weight obtained at each
station ranged from 39.86 to 73.70 gr/m2.
The results showed that the Scylla spp. found there are two types of S.serrata and
S. oceanica. Mangrove crab abundance at all stations ranged from 41.67 to
241.67 ind / ha. The distribution pattern of mangrove crabs were classified to the
clustered distribution. Scylla serrata are found abundantly in the area behind and
goes down to the waterfront area. Scylla oceanica is found abundantly in the front
area of forests and the less the rear area of mangrove forest. The measurement
results also find that the female mud crab abundance found at each station55 halamanSkripsi Sarjan
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
- …
