scholarly journals PALEONTOLOGY OF ACROPORA CORALS AND STANDARD FACIES BELT FROM UJUNGGENTENG AREA, WEST JAVA

2018 ◽  
Vol 28 (2) ◽  
pp. 129
Author(s):  
Wahyu Dwijo Santoso ◽  
Yahdi Zaim ◽  
Yan Rizal
Keyword(s):  
Wide Distribution ◽  
Research Area ◽  
Morphological Description ◽  
Acropora Cervicornis ◽  
West Java ◽  
Coralline Limestone

The detail taxonomy analysis was performed to classify Acropora corals in Ujunggenteng Area. The research area was selected because the continuously exposed Quaternary coralline limestones, indicated the high variation and wide distribution of coral fossils. Moreover, the facies changes and contacts with shoreface sediments were clearly observed in this area. Detail taxonomy based on morphological description can classify Acropora corals in Ujunggenteng area into four species: Acropora cervicornis, Acropora palifera, Acropora gemmifera, and Acropora humilis. The study of coral paleontology and the application of the presence of corals as a standard facies belt were still rarely performed in Indonesia. Previous studies classified the coralline limestone into one standard facies belt, which was the organic build- up standard facies belt. Another approach was required to capture many conditions of coral fossil occurrences; not only in build-up condition but also in transported condition. Therefore, another purpose of this study is to modify the standard facies belt with a different approach using coral taphonomy and sediment association.Analisis taksonomi secara detil dilakukan untuk mengklasifikasikan koral Acropora di daerah Ujunggenteng. Daerah penelitian dipilih karena tersingkapnya batugamping terumbu berumur Kuarter yang menerus, yang menunjukkan tingginya jumlah spesies dan distribusi fosil koral yang luas. Selain itu, perubahan fasies dan kontak dengan batupasir pantai dapat jelas diamati pada daerah ini. Taksonomi detil berdasarkan deskripsi morfologi dapat mengelompokkan koral Acropora di daerah Ujunggenteng menjadi empat spesies: Acropora cervicornis, Acropora palifera, Acropora gemmifera, dan Acropora humilis. Selain itu, studi mengenai paleontologi dan penggunaan kehadiran koral sebagai dasar pembagian sabuk standar fasies batugamping masih jarang dilakukan di Indonesia. Studi sebelumnya mengelompokkan batugamping terumbu menjadi satu sabuk standar fasies, yaitu organic build up. Pendekatan yang lain diperlukan untuk menjelaskan kondisi koral lainnya pada batugamping, tidak hanya dalam kondisi tumbuh, tetapi juga dalam kondisi tertransportasi. Oleh karena itu, penelitian ini bertujuan untuk memodifikasi sabuk standar fasies dengan pendekatan berbeda menggunakan tafonomi koral dan asosiasi sedimen. 

Geomorphic Indexes of Tectonic Activity Relative through The Analysis Quantitative in Cisanggarung Watershed, Kuningan District, West Java, Indonesia

2021 ◽  
pp. 367-375
Author(s):  
Ajeng Sekarkirana Pramesti Kameswara ◽  
Nana Sulaksana ◽  
Murni Sulastri ◽  
P. P. Raditya R.
Keyword(s):  
Activity Index ◽  
Shape Index ◽  
Research Area ◽  
Tectonic Activity ◽  
West Java ◽  
High Class ◽  
Watershed Area ◽  
Average Value ◽  
Active Tectonic ◽  
Class 1

The research area is very interesting to study to determine the characterization of the active tectonic influence of the Cisanggarung watershed, West Java. The research area is in Kuningan Regency, West Java. The purpose of this study was to determine the Relative Tectonic Activity Index (Iatr) in the Cisanggarung Watershed. Through the method approach used to identify the Relative Tectonic Activity Index (Iatr) using geomorphic indexes, watershed asymmetry factors (Af), watershed shape index (Bs), valley width, and height valley ratio (Vf), and mountainous face sinusitis (Smf). The Iatr research area is divided into 4 classes: Class 1 (very high), class 2 (high), class 3 (medium), and class 4 (low). Iatr distribution in 14 sub-watersheds covering an area of 286.24 km2 is Class 1 around 14.44% of the watershed area (41.35 km2) which is located in sub-watershed 1, with Smf values 1.157, Vf 0.3, Af 72.15, and Bs 4.3. Class 2 around 28.67% of the watershed area (82.09 km2) is located in sub-watershed 14, with Smf values 1.26, Vf 0.77, Af 15.69, Bs 1.01. Class 3 around 54.16% of the watershed area (155.03 km2) is located in sub-watersheds 2, 3, 6, 7, 8, 10, 11, 12, with an average value of Smf 2, Vf 1.54, Af 51.77, Bs 1.75, and Class 4 about 2.71% of the watershed area (7.76 km2) is located in sub- watersheds 4, 5, 9, 13, with an average value of Smf 2.25, Vf 8.18, Af 55.2, Bs 1.65. The results of the morphometric analysis indicated that the study area was mostly affected by tectonics and erosion.

Lurking in the Shadows: A New Species of Drypetes (Putranjivaceae) from Central Africa Hiding in Forest Plots and Herbaria

2021 ◽  
Vol 29 ◽  
pp. 14-23
Author(s):  
Alejandro Quintanar ◽  
Patricia Barberá ◽  
Diosdado Nguema ◽  
Vicent Medjibe ◽  
Zoë A. Goodwin ◽  
...  
Keyword(s):  
New Species ◽  
Democratic Republic ◽  
Conservation Status ◽  
Central Africa ◽  
Forest Tree ◽  
Wide Distribution ◽  
Morphological Description ◽  
Republic Of The Congo ◽  
Herbarium Collections ◽  
A New Species

Here we publish a new species of forest tree of the genus Drypetes Vahl (Putranjivaceae), D. umbricola D. J. Harris & Quintanar, which has a wide distribution in Central Africa (Cameroon, Central African Republic, Democratic Republic of the Congo, Gabon, and Republic of the Congo). It is known from 70 herbarium collections and additional sterile plot vouchers. A differential diagnosis, detailed morphological description, photographs, an illustration, and information about its habitat, distribution, and conservation status are provided.

scholarly journals Rock Mass Characterization And Rock Failure Probability Analysis of Rock Mining Areas at Lagadar, Bandung Regency and Batujajar, West Bandung Regency, West Java

2019 ◽  
Author(s):  
Fahmi Rohmadoni Rachman ◽  
Indra Andra Dinata ◽  
Achmad Sadisun
Keyword(s):  
Rock Mass ◽  
Failure Probability ◽  
Kinematic Analysis ◽  
Mining Area ◽  
Research Area ◽  
Rock Failure ◽  
West Java ◽  
Rock Mass Characterization ◽  
Slope Excavation ◽  
Rock Mining

Research area is located at coordinates 60 53’ 56” S, 1070 30’ 10” E up to 60 56’ 8” S, 1070 32’ 15” E which administratively covers Lagadar, Bandung Regency and Batujajar, West Bandung Regency, West Java. The research area is a rock mining area that is still being mined actively today. This research aims to characterize the rock mass, analyze rock failure probability, and optimize the slope excavation at the rock mining area.The conducted methods of this research are field observation, rock sampling, and scanline survey at 5 sites. The sites are F-5, F-10.1, F-10.2, F-11, and F-12. Quantitative method is conducted to characterize the rock mass, followed by analysis of rock failure probability with kinematic analysis method, and excavation optimization using kinematic analysis scenarios.

scholarly journals MORFOLOGIA DE FRUTO, SEMENTE E PLÂNTULA DE Sebastiania commersoniana, EUPHORBIACEAE

FLORESTA ◽  
2010 ◽  
Vol 40 (2) ◽  
Author(s):  
Nelson Luiz Cosmo ◽  
Antônio Carlos Nogueira ◽  
Jeniane Gonçalves de Lima ◽  
Yoshiko Saito Kuniyoshi
Keyword(s):  
Riparian Forest ◽  
Plant Morphology ◽  
Wide Distribution ◽  
Morphological Description ◽  
Southern Brazil ◽  
Test Installation ◽  
The Third ◽  
Random Samples ◽  
Cylindrical Axis ◽  
Alluvial Forest

Neste estudo, realizou-se a descrição morfológica de fruto, semente e plântula de Sebastiania commersoniana (Baillon) L. B. Smith & R. J. Downs (branquilho), espécie arbórea de ampla distribuição no sul do Brasil, especialmente nas planícies aluviais da Floresta Ombrófila Mista. Foram obtidos frutos de dez matrizes em Engenheiro Bley, distrito da Lapa-PR. Para a descrição e ilustração do fruto e da semente, 50 amostras aleatórias foram analisadas. As sementes foram colocadas em rolo de papel-toalha, e em substrato comercial, postas para germinar em germinador Biomatic, a 25 oC. A espécie tem fruto deiscente do tipo esquizocarpáceo tricoca. A semente é carunculada, com hilo, rafe e micrópila visíveis sob lupa, tegumento papiráceo e endosperma oleaginoso, tendo dispersão autocórica e zoocórica. O embrião é dominante, axial, espatulado, com cotilédones foliáceos, cordiformes e eixo hipocótilo-radicular cilíndrico. A germinação iniciou-se por volta do terceiro e quarto dias após a instalação do teste, sendo a plântula epígea, fanerocotiledonar. Decorreram cerca de dez dias até a abertura dos paracotilédones e 15 dias até o início do desenvolvimento do epicótilo. Diversas características aqui descritas explicam, em parte, a eficiente e expressiva distribuição da espécie em sua área de ocorrência natural. Palavras-chave: Morfologia vegetal; germinação; floresta aluvial; floresta ciliar.   Abstract Morphology of the fruit, seed and seedling of Sebastiania commersoniana, Euphorbiaceae. This work consists on a morphological description of the fruit, seed and seedling of Sebastiania commersoniana (Baillon) L. B. Smith & R. J. Downs (branquilho), tree species with wide distribution in southern Brazil, especially in the floodplains of the Mixed Ombrophylous Forest. For this, they were obtained fruits of ten trees in the district of Engenheiro Bley, municipality of Lapa-PR. For description and illustration of the fruits and seeds, 50 random samples were used. For germination, seeds were placed on paper-towel and on commercial substrate, in Biomatic germinator, at 25 ºC. S. commersoniana has a dehiscent schizocarpic fruit, with three fruitlets. The albuminous seed has a papyraceous seed coat with caruncle, hilum, raphe and micropyle visible under magnifying glass. The embryo is dominant, axial, espatulate, with cordate, foliaceous cotyledons and cylindrical axis. The germination started up around the third and fourth days after the test installation and the seedling is epigeal, phanerocotyledonous. The opening of the paracotyledons and the beginning of the epicotyl development occurred about 15 days after the test installation. Several characteristics described in this paper explains, in part, the efficient and expressive distribution of this species in its area of natural occurrence.Keywords: Plant morphology; germination; alluvial forest; riparian forest.

Applying the Horizon Based Tomography Method to Update Interval Velocity Model, Identify The Structure of Pre-Stack Depth Migration 3D and Estimate The Hydrocarbon Reserve In SBI Field of North West Java Basin

2014 ◽  
Vol 69 (6) ◽  
Author(s):  
Sudra Irawan ◽  
Sismanto Sismanto ◽  
Adang Sukmatiawan
Keyword(s):  
Data Processing ◽  
Seismic Data ◽  
Velocity Model ◽  
Research Area ◽  
Seismic Data Processing ◽  
West Java ◽  
North West ◽  
Depth Migration ◽  
Interval Velocity ◽  
Tomography Method

Seismic data processing is one of the three stages in the seismic method that has an important role in the exploration of oil and gas. Without good data processing, it is impossible to get seismic image cross section for good interpretation. A research using seismic data processing was done to update the velocity model by horizon based tomography method in SBI Field, North West Java Basin. This method reduces error of seismic wave travel time through the analyzed horizon because the existence velocity of high lateral variation in research area. There are three parameters used to determine the accuracy of the resulting interval velocity model, namely, flat depth gathers, semblance residual moveout that coincides with the axis zero residual moveout, and the correspondence between image depth (horizon) with wells marker  (well seismic tie). Pre Stack Depth Migration (PSDM) form interval velocity model and updating using horizon-based tomography method gives better imaging of under-surfaced structure results than PSDM before using tomography. There are three faults found in the research area, two normal faults have southwest-northeast strike and the other has northwest-southeast strike. The thickness of reservoir in SBI field, North West Java Basin, is predicted between 71 to 175 meters and the hydrocarbon (oil) reserve is predicted about  with 22.6% porosity and 70.7% water saturation. 

scholarly journals Shoreline Change with Groin Coastal Protection Structure at North Java Beach

2020 ◽  
Vol 11 (1) ◽  
pp. 19-28
Author(s):  
Oki Setyandito ◽  
Aldo Christanto Purnama ◽  
Nur Yuwono ◽  
Juliastuti Juliastuti ◽  
Yureana Wijayanti
Keyword(s):  
Significant Wave Height ◽  
Surf Zone ◽  
Shoreline Change ◽  
Research Area ◽  
Coastal Protection ◽  
Wave Direction ◽  
West Java ◽  
Significant Wave ◽  
North Beach ◽  
Topography Data

The research aimed to study the effect of groin application to erosion at the shoreline. The method utilized the bathymetry and topography data of north beach of Balongan, West Java. Modeling of the shoreline change due to groin installment used software called GENESIS. Based on analysis result, it is found that the significant wave direction comes from the southeast with significant wave height of 1,18 meters and surf zone width of 140 meters. It is concluded that at research area of north beach of west Java, I-groin with length of 70 meters and T head groin of 60 meters in long T-groin effectively overcome erosion and advance the coastline by 10786,62 m2 or in average 6,3 meters.

scholarly journals Molecular data and updated morphological description of Flabellina rubrolineata (Nudibranchia: Flabellinidae) from the Red and Arabian seas

2020 ◽  
Vol 30 (4) ◽  
pp. 183-194
Author(s):  
Irina A. Ekimova ◽  
Tatiana I. Antokhina ◽  
Dimitry M. Schepetov
Keyword(s):  
Indian Ocean ◽  
Mediterranean Sea ◽  
Red Sea ◽  
Phylogenetic Trees ◽  
Molecular Data ◽  
Wide Distribution ◽  
Morphological Description ◽  
West Pacific ◽  
West Indian Ocean ◽  
The Mediterranean

Flabellina rubrolineata was believed to have a wide distribution range, being reported from the Mediterranean Sea (non-native), the Red Sea, the Indian Ocean and adjacent seas, and the Indo-West Pacific and from Australia to Hawaii. In the present paper, we provide a redescription of Flabellina rubrolineata, based on specimens collected near the type locality of this species in the Red Sea. The morphology of this species was studied using anatomical dissections and scanning electron microscopy. To place this species in the phylogenetic framework and test the identity of other specimens of F. rubrolineata from the Indo-West Pacific we sequenced COI, H3, 16S and 28S gene fragments and obtained phylogenetic trees based on Bayesian and Maximum likelihood inferences. Our morphological and molecular results show a clear separation of F. rubrolineata from the Red Sea from its relatives in the Indo-West Pacific. We suggest that F. rubrolineata is restricted to only the Red Sea, the Arabian Sea and the Mediterranean Sea and to West Indian Ocean, while specimens from other regions belong to a complex of pseudocryptic species.

LUMUT SEJATI DI HUTAN ALAM PAMEUNGPEUK, TAMAN NASIONAL GUNUNG HALIMUN SALAK, JAWA BARAT

2017 ◽  
Vol 16 (2) ◽  
Author(s):  
Florentina Indah Windadri
Keyword(s):  
New Record ◽  
National Park ◽  
Dominant Species ◽  
Research Area ◽  
Primary Forest ◽  
Conservation Areas ◽  
West Java ◽  
Lowland Forest

Halimun Salak National Park is one of the remaining conservation areas left in West Java. Research on diversity of Bryophytes had previously been conducted at  Halimun Mount, Kendeng Mount and  the lowland forest surrounding Cikaniki-Citalahab, while this present  study was aimed to  record the diversity of mosses at Pameungpeuk primary forest. There were 78 species  of mosses including in 47 genera and 20 families. Syrrhopodon spiculosus Hook. & Grev. was a dominant species in the research area. Twenty seven species were new record for Halimun Salak National Park, one of which (Rhizogonium lamii Reimers) was a new record for Java and seven species were new record for Indonesia.

scholarly journals Efficiency Analysis of Deeplearning4J Neural Network Classifiers in Development of Transition Based Dependency Parsers

2021 ◽  
Vol 18 (1) ◽  
pp. 33-39
Author(s):  
László Csépányi-Fürjes ◽  
László Kovács
Keyword(s):  
Text Processing ◽  
Data Representation ◽  
Research Area ◽  
Morphological Description ◽  
Dependency Parsing ◽  
Text Documents ◽  
Natural Language Text ◽  
Active Research ◽  
Neural Network Classifiers ◽  
Hungarian Language

Abstract Dependency parsing is a complex process in natural language text processing, text to semantic transformation. The efficiency improvement of dependency parsing is a current and an active research area in the NLP community. The paper presents four transition-based dependency parser models with implementation using DL4J classifiers. The efficiency of the proposed models were tested with Hungarian language corpora. The parsing model uses a data representation form based on lightweight embedding and a novel morphological-description-vector format is proposed for the input layer. Based on the test experiments on parsing Hungarian text documents, the proposed list-based transitions parsers outperform the widespread stack-based variants.

scholarly journals VARIATION IN AGGRESSIVENESS AND AFLP AMONG Alternaria solani ISOLATES FROM INDONESIA

2018 ◽  
Vol 18 (2) ◽  
pp. 51
Author(s):  
Chaerani Chaerani ◽  
M. Kosim Kardin ◽  
Suhardi Suhardi ◽  
Eri Sofiari ◽  
Ria V. Van Ginkel ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Resistance Genes ◽  
Early Blight ◽  
Geographic Origin ◽  
Alternaria Solani ◽  
Wide Distribution ◽  
Effective Resistance ◽  
West Java ◽  
Low Genetic Diversity ◽  
The Us

<p><em>Alternaria solani </em>is a necrotroph fungus that causes three-phased diseases in tomato. Management of the pathogen by using resistant cultivars requires knowledge on the aggressiveness and genetic diversity of the fungus. The aims of this study were to isolate <em>A. solani </em>from major tomato and potato producing areas in Indonesia and to study their aggressiveness and genetic variability. Twenty two<strong> </strong><em>A. solani</em><strong> </strong>isolates were recovered from early blighted tomato and potato in Central and West Java.<strong>  </strong><em>A. alternata</em><strong> </strong>was also isolated from tomato leaves in West Java and North Sumatra, indicating that early blight in Indonesia may be caused by more than one <em>Alternaria </em>species. Resistance tests of four tomato genotypes to selected<strong> </strong><em>A. solani</em><strong> </strong>isolates revealed that local isolates were more aggressive in inciting early blight and stem lesion than an imported isolate from USA. This implies that introduced breeding materials must be tested to local isolates to obtain effective resistance genes. Cluster analysis based on amplified fragment length polymorphism (AFLP) obtained from <em>Eco</em>RI+AG and<strong> </strong><em>Mse</em>I+C primer amplification separated 28 local and Taiwan isolates from the US isolate, which was coincided with aggressiveness separation between the local isolates and the US isolate. Three clusters of AFLP genotypes which did not associate with geographic origin were observed among tropical isolates. The low genetic diversity among the Indonesian isolates suggests clonal population structure with wide distribution. Successful local tomato breeding requires the availability of local<strong> </strong><em>A. solani </em>collection with well-characterized aggressiveness level and molecular diversity to obtain effective resistance genes.</p>

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