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Showing papers by "Indonesian Institute of Sciences published in 2016"


Journal ArticleDOI
TL;DR: In this paper, the authors synthesize existing clay mineralogical and geochemical data from similar to 1500 samples from the seafloor and surrounding rivers, deepwater mooring observation results, and high resolution glacial-cyclic clay mineralogy records from six high-quality sediment cores.

329 citations


Journal ArticleDOI
TL;DR: This study provides the first global field evidence for the requirement of a critical mass for recovery of seagrass species, which may also hold for other foundation species showing strong positive feedback to a dynamic environment.
Abstract: In coastal and estuarine systems, foundation species like seagrasses, mangroves, saltmarshes or corals provide important ecosystem services. Seagrasses are globally declining and their reintroduction has been shown to restore ecosystem functions. However, seagrass restoration is often challenging, given the dynamic and stressful environment that seagrasses often grow in. From our world-wide meta-analysis of seagrass restoration trials (1786 trials), we describe general features and best practice for seagrass restoration. We confirm that removal of threats is important prior to replanting. Reduced water quality (mainly eutrophication), and construction activities led to poorer restoration success than, for instance, dredging, local direct impact and natural causes. Proximity to and recovery of donor beds were positively correlated with trial performance. Planting techniques can influence restoration success. The meta-analysis shows that both trial survival and seagrass population growth rate in trials that survived are positively affected by the number of plants or seeds initially transplanted. This relationship between restoration scale and restoration success was not related to trial characteristics of the initial restoration. The majority of the seagrass restoration trials have been very small, which may explain the low overall trial survival rate (i.e. estimated 37%). Successful regrowth of the foundation seagrass species appears to require crossing a minimum threshold of reintroduced individuals. Our study provides the first global field evidence for the requirement of a critical mass for recovery, which may also hold for other foundation species showing strong positive feedback to a dynamic environment.Synthesis and applications. For effective restoration of seagrass foundation species in its typically dynamic, stressful environment, introduction of large numbers is seen to be beneficial and probably serves two purposes. First, a large-scale planting increases trial survival - large numbers ensure the spread of risks, which is needed to overcome high natural variability. Secondly, a large-scale trial increases population growth rate by enhancing self-sustaining feedback, which is generally found in foundation species in stressful environments such as seagrass beds. Thus, by careful site selection and applying appropriate techniques, spreading of risks and enhancing self-sustaining feedback in concert increase success of seagrass restoration.

313 citations


Journal ArticleDOI
TL;DR: Transgenic events NASFer-274 containing rice nicotianamine synthase and soybean ferritin genes showed a single locus insertion without a yield penalty or altered grain quality, indicating that Fe is bioavailable.
Abstract: More than two billion people are micronutrient deficient. Polished grains of popular rice varieties have concentration of approximately 2 μg g(-1) iron (Fe) and 16 μg g(-1) zinc (Zn). The HarvestPlus breeding programs for biofortified rice target 13 μg g(-1) Fe and 28 μg g(-1) Zn to reach approximately 30% of the estimated average requirement (EAR). Reports on engineering Fe content in rice have shown an increase up to 18 μg g(-1) in glasshouse settings; in contrast, under field conditions, 4 μg g(-1) was the highest reported concentration. Here, we report on selected transgenic events, field evaluated in two countries, showing 15 μg g(-1) Fe and 45.7 μg g(-1) Zn in polished grain. Rigorous selection was applied to 1,689 IR64 transgenic events for insert cleanliness and, trait and agronomic performances. Event NASFer-274 containing rice nicotianamine synthase (OsNAS2) and soybean ferritin (SferH-1) genes showed a single locus insertion without a yield penalty or altered grain quality. Endosperm Fe and Zn enrichment was visualized by X-ray fluorescence imaging. The Caco-2 cell assay indicated that Fe is bioavailable. No harmful heavy metals were detected in the grain. The trait remained stable in different genotype backgrounds.

241 citations


Journal ArticleDOI
Jaroslav Adam1, Dagmar Adamová2, Madan M. Aggarwal3, G. Aglieri Rinella4  +1020 moreInstitutions (95)
TL;DR: In this article, the authors reported the first results of elliptic (v2), triangular (v3), and quadrangular (v4) flow of charged particles in Pb-Pb collisions at a center-of-mass energy per nucleon pair of √sNN=5.02
Abstract: We report the first results of elliptic (v2), triangular (v3), and quadrangular (v4) flow of charged particles in Pb-Pb collisions at a center-of-mass energy per nucleon pair of √sNN=5.02 TeV with the ALICE detector at the CERN Large Hadron Collider. The measurements are performed in the central pseudorapidity region |η|<0.8 and for the transverse momentum range 0.2

159 citations


Journal ArticleDOI
Jaroslav Adam1, Dagmar Adamová2, Madan M. Aggarwal3, G. Aglieri Rinella4  +994 moreInstitutions (97)
TL;DR: In this article, the authors report the measurements of correlations between event-by-event fluctuations of amplitudes of anisotropic flow harmonics in nucleus-nucleus collisions, obtained for the first time using a new analysis method based on multiparticle cumulants in mixed harmonics.
Abstract: We report the measurements of correlations between event-by-event fluctuations of amplitudes of anisotropic flow harmonics in nucleus-nucleus collisions, obtained for the first time using a new analysis method based on multiparticle cumulants in mixed harmonics. This novel method is robust against systematic biases originating from non-flow effects and by construction any dependence on symmetry planes is eliminated. We demonstrate that correlations of flow harmonics exhibit a better sensitivity to medium properties than the individual flow harmonics. The new measurements are performed in Pb-Pb collisions at the centre-of-mass energy per nucleon pair of $\sqrt{s_{_{\rm NN}}}=2.76$ TeV by the ALICE experiment at the Large Hadron Collider (LHC). The centrality dependence of correlation between event-by-event fluctuations of the elliptic, $v_2$, and quadrangular, $v_4$, flow harmonics, as well as of anti-correlation between $v_2$ and triangular, $v_3$, flow harmonics are presented. The results cover two different regimes of the initial state configurations: geometry-dominated (in mid-central collisions) and fluctuation-dominated (in the most central collisions). Comparisons are made to predictions from MC-Glauber, viscous hydrodynamics, AMPT and HIJING models. Together with the existing measurements of individual flow harmonics the presented results provide further constraints on initial conditions and the transport properties of the system produced in heavy-ion collisions.

154 citations


Journal ArticleDOI
TL;DR: It is revealed that comparatively less research is undertaken in the world’s most biodiverse countries, the science conducted in these countries is often not led by researchers based in-country, and these scientists are also underrepresented in important international fora.
Abstract: Target 19, set by the Convention on Biological Diversity, seeks to improve the knowledge, science base, and technologies relating to biodiversity. We will fail to achieve this target unless prolific biases in the field of conservation science are addressed. We reveal that comparatively less research is undertaken in the world’s most biodiverse countries, the science conducted in these countries is often not led by researchers based in-country, and these scientists are also underrepresented in important international fora. Mitigating these biases requires wide-ranging solutions: reforming open access publishing policies, enhancing science communication strategies, changing author attribution practices, improving representation in international processes, and strengthening infrastructure and human capacity for research in countries where it is most needed.

133 citations


Journal ArticleDOI
TL;DR: In this paper, the causes and history of forest loss in Indonesia from 1950 to 2015 were investigated and the authors concluded that export-oriented log production and global demand were the primary factors underlying forest loss.

122 citations


Journal ArticleDOI
TL;DR: In this paper, a pre-drying treatment of sprayed particles was performed to observe the effect of the pre-pressing moisture content of the sprayed particles on the physical properties of the particleboards.

94 citations


Journal ArticleDOI
05 Aug 2016
TL;DR: The Technical Implementation Unit for Mine's Technology Assessment Jampang Kulon - LIPI, organizationally under and responsible to the Head of Geotechnology Research Center, Deputy of Earth Sciences, Indonesian Institute of Sciences, and Quality of Service (QoS) is defined as a measure of how well the network performs.
Abstract: – Technical Implementation Unit for Mine’s Technology Assessment Jampang Kulon - LIPI, organizationally under and responsible to the Head of Geotechnology Research Center, Deputy of Earth Sciences, Indonesian Institute of Sciences. To support research and development activities, administration and cooperation is in need of Internet-based information systems. Quality of Service (QoS) is defined as a measure of how well the network and is an attempt to define the characteristics and nature of the service. In an Internet Protocol (IP), IP QoS refers to the performance of the -Package IP packets passing through one or more networks. QoS is designed to help end users become more productive by ensuring that end users get reliable performance of network-based applications. QoS refers to the ability of a network to provide better service at a specific network traffic through different technologies. Computer network performance can vary due to several problems, such as problems of bandwidth, latency and jitter, which can make the effect is large enough for many applications. Features Quality of Service (QoS) can make the bandwidth, latency and jitter are predictable and matched to the needs of applications that are used in the existing network . Keywords – Quality of Service, Internet Protocol, Bandwith, latency, jitter

87 citations


Journal ArticleDOI
TL;DR: A 2,000-year, multiproxy reconstruction of western Pacific hydroclimate from two speleothem records for southeastern Indonesia highlights the likelihood that century-scale variations in tropical Pacific climate modes can significantly modulate radiatively forced shifts in global temperature.
Abstract: Australian Research Council Discovery [DP0663274, DP1095673]; NOAA/UCAR Climate and Global Change Postdoctoral Fellowship; William Paterson University; Lewis and Clark College Mellon Research Initiative Fellowship; US NSF

85 citations


Journal ArticleDOI
TL;DR: In this article, the effect of chemical citric acid and other leaching reagents including inorganic acid, organic acid, and other organic acid on nickel extraction from low-grade Indonesian saprolitic ores was evaluated.

Journal ArticleDOI
TL;DR: Demethylation of methylphosphonate may also contribute to methane release from lakes and that phosphate can repress this activity, and it is suggested that some of the excess methane in the Lake Matano surface water, and in other methane-rich lakes, may be produced by P-starved bacteria.
Abstract: Freshwater lakes emit large amounts of methane, some of which is produced in oxic surface waters. Two potential pathways for aerobic methane production exist: methanogenesis in oxygenated water, which has been observed in some lakes, and demethylation of small organic molecules. Although methane is produced via demethylation in oxic marine environments, this mechanism of methane release has not yet been demonstrated in freshwater systems. Genes related to the C-P lyase pathway, which cleaves C-P bonds in phosphonate compounds, were found in a metagenomic survey of the surface water of Lake Matano, which is chronically P starved and methane rich. We demonstrate that four bacterial isolates from Lake Matano obtain P from methylphosphonate and release methane and that this activity is repressed by phosphate. We further demonstrate that expression of phnJ, which encodes the enzyme that releases methane, is higher in the presence of methylphosphonate and lower when both methylphosphonate and phosphate are added. This gene is also found in most of the metagenomic data sets from freshwater environments. These experiments link methylphosphonate degradation and methane production with gene expression and phosphate availability in freshwater organisms and suggest that some of the excess methane in the Lake Matano surface water, and in other methane-rich lakes, may be produced by P-starved bacteria. IMPORTANCE Methane is an important greenhouse gas and contributes substantially to global warming. Although freshwater environments are known to release methane into the atmosphere, estimates of the amount of methane emitted by freshwater lakes vary from 8 to 73 Tg per year. Methane emissions are difficult to predict in part because the source of the methane can vary: it is the end product of the energy-conserving pathway in methanogenic archaea, which live predominantly in anoxic sediments or waters but have also been identified in some oxic freshwater environments. More recently, methane release from small organic molecules has been observed in oxic marine environments. Here we show that demethylation of methylphosphonate may also contribute to methane release from lakes and that phosphate can repress this activity. Since lakes are typically phosphorus limited, some methane release in these environments may be a by-product of phosphorus metabolism rather than carbon or energy metabolism. Methane emissions from lakes are currently predicted using primary production, eutrophication status, extent of anoxia, and the shape and size of the lake; to improve prediction of methane emissions, phosphorus availability and sources may also need to be included in these models.

Journal ArticleDOI
TL;DR: In this article, a review of several topics related to resource, energy consumption, policy and research and development activities of biofuel in Indonesia is provided, some recommendation provided to encourage the biofuel development in the near future.

Journal ArticleDOI
TL;DR: In this paper, a framework to quantify the performances of the various possible carbon flows on global warming impacts is formulated, and the analysis is focused on eight scenarios of various carbon flows encompassing biomass decomposition in fields and its alternative utilization as bioenergy feedstocks.

Journal ArticleDOI
17 Jun 2016-PLOS ONE
TL;DR: The diversity and diversification of taro accessions from nineteen countries in Asia, the Pacific, Africa and America were investigated, with the highest genetic diversity and number of private alleles in Asian accessions, mainly from India.
Abstract: Taro (Colocasia esculenta (L.) Schott) is widely distributed in tropical and sub-tropical areas. However, its origin, diversification and dispersal remain unclear. While taro genetic diversity has been documented at the country and regional levels in Asia and the Pacific, few reports are available from Americas and Africa where it has been introduced through human migrations. We used eleven microsatellite markers to investigate the diversity and diversification of taro accessions from nineteen countries in Asia, the Pacific, Africa and America. The highest genetic diversity and number of private alleles were observed in Asian accessions, mainly from India. While taro has been diversified in Asia and the Pacific mostly via sexual reproduction, clonal reproduction with mutation appeared predominant in African and American countries investigated. Bayesian clustering revealed a first genetic group of diploids from the Asia-Pacific region and to a second diploid-triploid group mainly from India. Admixed cultivars between the two genetic pools were also found. In West Africa, most cultivars were found to have originated from India. Only one multi-locus lineage was assigned to the Asian pool, while cultivars in Madagascar originated from India and Indonesia. The South African cultivars shared lineages with Japan. The Caribbean Islands cultivars were found to have originated from the Pacific, while in Costa Rica they were from India or admixed between Indian and Asian groups. Taro dispersal in the different areas of Africa and America is thus discussed in the light of available records of voyages and settlements.

Journal ArticleDOI
TL;DR: It is discovered that incorporating a socio-political context alters the selection of priority areas, and ecological benefits are likely to be reduced and/or opportunity costs of alternative land uses are to be increased.

Journal ArticleDOI
TL;DR: Neem leaves are believed to treat diabetes in both Balinese and Indian communities and Limonoids can not be considered the only responsible of digestive properties.


Journal ArticleDOI
TL;DR: The biogeographical history of hyperdiverse and flightless Trigonopterus weevils is revealed and different approaches to ancestral area reconstruction suggest a complex east to west range expansion.
Abstract: The Sunda Arc forms an almost continuous chain of islands and thus a potential dispersal corridor between mainland Southeast Asia and Melanesia. However, the Sunda Islands have rather different geological histories, which might have had an important impact on actual dispersal routes and community assembly. Here, we reveal the biogeographical history of hyperdiverse and flightless Trigonopterus weevils. Different approaches to ancestral area reconstruction suggest a complex east to west range expansion. Out of New Guinea, Trigonopterus repeatedly reached the Moluccas and Sulawesi transgressing Lydekker's Line. Sulawesi repeatedly acted as colonization hub for different segments of the Sunda Arc. West Java, East Java and Bali are recognized as distinct biogeographic areas. The timing and diversification of species largely coincides with the geological chronology of island emergence. Colonization was not inhibited by traditional biogeographical boundaries such as Wallace's Line. Rather, colonization patterns support distance dependent dispersal and island age limiting dispersal.

Journal ArticleDOI
TL;DR: In this paper, the authors estimate the spatial distribution of coseismic slip during the 2007 Mw 8.4 Bengkulu earthquake in Sumatra and estimate afterslip following this earthquake with SuGAr postseismic time series spanning ∼6.3 years after the earthquake.
Abstract: The 12 September 2007 Mw 8.4 Bengkulu earthquake in Sumatra marked the first in a modern series of large earthquakes along the Mentawai section of the Sunda megathrust. Understanding the spatial distribution of coseismic slip and ensuing afterslip is important for assessing seismic hazard in neighboring unruptured regions of the megathrust. We re-estimate the spatial distribution of coseismic slip during this earthquake with improved coseismic offsets from the Sumatran GPS Array (SuGAr), and estimate afterslip following this earthquake with SuGAr postseismic time series spanning ∼6.3 years after the earthquake. We invert for the spatio-temporal distribution of afterslip with the principal component analysis-based inversion method (PCAIM), and we take into account viscoelastic deformation by incorporating into the inversion the estimation of strain within ductile deforming blocks located at asthenospheric depths. Our results suggest cumulative afterslip concentrated within, updip and downdip of the 2007 coseismic rupture area, and shallow afterslip that borders and overlaps the 2010 Mw 7.8 Mentawai earthquake rupture zone. The cumulative contribution of stress changes due to the coseismic event and the ensuing afterslip likely increased strain rates in the shallow portion of the megathrust adjacent to the Mentawai earthquake rupture area, potentially promoting its rupture in 2010.

Journal ArticleDOI
21 Apr 2016
TL;DR: In this article, the authors observed wild N. javanicus in a highly fragmented, montane agroforest area to determine if climate variables and forest connectivity influence activity budget and behavior.
Abstract: Joint impacts of anthropogenic disturbance and climate change are of pressing concern for modern conservationists. Climate change patterns have various diminishing effects on the biodiversity of an ecosystem, requiring an understanding of a species’ ability to adapt. Agricultural practices are expanding at an altitudinal gradient on the Indonesian island of Java, forcing endemic species to range at increased elevation with lower temperatures, and in human-populated areas. One example is the Critically Endangered Javan slow loris (Nycticebus javanicus), which finds itself increasingly restricted to montane regions with extreme climate patterns and habitat disturbance. We observed wild N. javanicus in a highly fragmented, montane agroforest area to determine if climate variables and forest connectivity influence activity budget and behavior. Lorises ranged at different altitudes (1275 m above sea level (asl)—1570 m asl) and were observed for six months in Cipaganti, West Java. Using multinomial regression analyses, we found loris individuals were most likely to engage in increased foraging, feeding and travelling behavior than resting when relative humidity increases and in habitats with greater forest connectivity. Regression analyses found effects of relative humidity and forest connectivity to be the most significant predictors of N. javanicus foraging behavior (P = 0.001, P = 0.030). We suggest that future-climate shifts and increased anthropogenic disturbance will detrimentally influence wild populations of N. javanicus, requiring immediate plans for mitigation in conserving these already scarce wild populations. We also suggest the altering of reintroduction protocols in relation to climate and geographic region.

Journal ArticleDOI
21 Jun 2016
TL;DR: In this paper, the discovery of microplastic in sediment from the sea of western Sumatra at a depth more than 2000 m, indicated that plastic, considered new developed materials (early nineteen centuries made), has invaded marine areas, including pristine areas.
Abstract: Indonesia was recently ranked second on the list of countries producing plastic waste. Plastic can be degraded by thermal oxidation either with ultraviolet radiation and by mechanical to a very small size the size will be smaller. Degraded plastic with small sizes (<5 mm) measured has been micrometers known as microplastic. We took sediment samples on 07-18 May 2015 in EWIN 2015 cruise, which part of the contribution of Indonesian researchers for the International Indian Ocean Expedition-2 program, at 66.8 to 2182 m below sea level. Microplastic analysis from the sediment was carried out by using flotation methods. We found microplastic in 8 locations out of 10 sampling locations. We found 41 particles microplastic with a form of granules (35 particles) and fibers (6 particles). Most of microplastic particles were found at depths less than 500 m with 20 particles. The discovery of microplastic in the sediment from the sea of western Sumatra at a depth more than 2000 m, indicated that plastic, considered new developed materials (early nineteen centuries made), has invaded marine areas, including pristine areas. It confirms the statement that plastic waste has spread widely to different areas of the seas and oceans, including remote and mostly unknown areas such as the deep sea.

Journal ArticleDOI
TL;DR: In this paper, the authors focus on the classification of the whole footprint family, which is the key to making sense of the footprint concept that is varying across disciplines and evolving over time.

Journal ArticleDOI
TL;DR: Fruit characters of Pisang Berlin and Ambon Hijau are close related to their ancestral parents’ Musa acuminata wild species, whereas Pisang Kepok and Pisang Raja Bandung as hybrid cultivars have intermediate characters between Musa Acuminata and Musa balbisiana wild species.
Abstract: Aims of this research were to describe the morphology and analyze nutrient values of mature fruits at three different genomic groups of Indonesian banana cultivars including Pisang Berlin (AA), Ambon Hijau (AAA), Raja Bandung (ABB) and Kepok (ABB). Fruit characterization results show that each banana cultivar had specific characteristics related to their genomic group. Pisang Berlin has bright yellow peel and pulp, sugary taste. Pisang Ambon Hijau has fine curved fruit shape, sweet taste and aromatic. Pisang Raja Bandung has medium thickness and yellow peel, firm flesh, sweet and slightly acidic taste. Pisang Kepok has thick coarse and yellow peel with dark brown blotches, mild sweet taste. Fruit characters of Pisang Berlin and Ambon Hijau are close related to their ancestral parents’ Musa acuminata wild species, whereas Pisang Kepok and Pisang Raja Bandung as hybrid cultivars have intermediate characters between Musa acuminata and Musa balbisiana wild species. Nutrient analysis revealed that mature banana pulp contain of high carbo-hydrates (16.72-35.24 g 100g -1 ), total sugar (12.12-20.82 g 100g -1 ), vitamin C (16.45-30.27 g 100g -1 ) and potassium (275-375 g 100g -1 ); moderate protein (1.48-1.78 g 100g -1 ) and low fat (0.03-0.08 g 100g -1 ). About 100 g edible portion of banana fruit produce 73.43 to 148.80 calories.

DOI
30 Dec 2016
TL;DR: Kunci et al. as discussed by the authors, in his article "Abstrak Lahirnya UU No.6/2014 tentang desa telah membuka peluang bagi desa untuk menjadi mandiri and otonom.
Abstract: Abstrak Lahirnya UU No.6/2014 tentang desa telah membuka peluang bagi desa untuk menjadi mandiri dan otonom. Otonomi desa yang dimaksud adalah otonomi pemerintah desa dalam melakukan pengelolaan keuangan desa. Salah satu program yang diberikan pemerintah saat ini adalah pemberian dana desa dengan proporsi 90:10. Tujuan pemberian dana desa ini adalah untuk mendanai penyelenggaraan pemerintahan, pelaksanaan pembangunan, dan pemberdayaan masyarakat desa. Namun, dalam pelaksanaan penggunaan dana desa masih dirasakan belum efektif dikarenakan belum memadainya kapasitas dan kapabilitas pemerintah desa dan belum terlibatnya peran serta masyarakat secara aktif dalam pengelolaan dana desa. Kata Kunci : otonomi desa, efektivitas, dana desa

Journal ArticleDOI
TL;DR: In this article, different quantitative indices were proposed to determine the cultural importance of ethnobotanically valuable plants in order to develop a tool for the evaluation of immaterial cultural heritage.

Journal ArticleDOI
TL;DR: In this article, the authors examined responses of small-scale fishers and traders to a proposed fisheries management initiative in Indonesia and found that fishers generally viewed market-based incentives positively, seeing them as enhancing their livelihoods and freeing them from debt-based patronage relationships.

Journal ArticleDOI
01 Nov 2016
TL;DR: In this paper, magnetic nanoparticles of Fe3O4 (magnetite) have been synthesized from natural sand iron by co-precipitation method using HCl as solvent and NH3 as co precipitate.
Abstract: Magnetic nanoparticles of Fe3O4 (magnetite) have been synthesized from natural sand iron by co-precipitation method. The nanoparticles were synthesized using HCl as solvent and NH3 as co-precipitate. The nanoparticles synthesized at 70°C in two different treatments. Sample without Polyethylene Glycol (PEG) 6000 noted by A and sample with PEG 6000 noted by B symbol. The measurement that have been done for both samples were XRD (X-ray diffraction), FTIR (Fourier Transform Infrared) Spectrometry, SEM (Scanning electron microscopy), VSM (Vibrating sample magnetometer) and SAA (Surface area analyzer). The results showed that both samples were having Fe3O4 phases. Particle size, coercivity and magnetic saturation of B samples were smaller than A samples. But the surface area of B sample was larger than A sample. Both samples were then used to adsorb Cu and Pb ions using shaker method. Adsorption analysis from Atomic Adsorption Spectroscopy (AAS) showed that B was more effectivein adsorbing metal ions than A. The adsorption value of Cu and Pb ions were 79 and 91% respectively.

Journal ArticleDOI
Jaroslav Adam1, Dagmar Adamová2, Madan M. Aggarwal3, G. Aglieri Rinella4  +1019 moreInstitutions (95)
TL;DR: In this paper, the performance of the Bayesian approach for charged pions, kaons, protons, and D-0 mesons in the central barrel of ALICE is studied.
Abstract: We present a Bayesian approach to particle identification (PID) within the ALICE experiment. The aim is to more effectively combine the particle identification capabilities of its various detectors. After a brief explanation of the adopted methodology and formalism, the performance of the Bayesian PID approach for charged pions, kaons and protons in the central barrel of ALICE is studied. PID is performed via measurements of specific energy loss (dE/dx) and time of flight. PID efficiencies and misidentification probabilities are extracted and compared with Monte Carlo simulations using high-purity samples of identified particles in the decay channels K-S(0) -> pi(-)pi(+), phi -> K-K+, and A -> p pi(-) in p-Pb collisions at root sNN = 5.02 TeV. In order to thoroughly assess the validity of the Bayesian approach, this methodology was used to obtain corrected p(T) spectra of pions, kaons, protons, and D-0 mesons in pp collisions at root s = 7TeV. In all cases, the results using Bayesian PID were found to be consistent with previous measurements performed by ALICE using a standard PID approach. For the measurement of D-0 -> K-pi(+), it was found that a Bayesian PID approach gave a higher signal-to-background ratio and a similar or larger statistical significance when compared with standard PID selections, despite a reduced identification efficiency. Finally, we present an exploratory study of the measurement of A(c)(+) -> pK(-)pi(+) in pp collisions at root s = 7TeV, using the Bayesian approach for the identification of its decay products.

Journal ArticleDOI
30 May 2016
TL;DR: The implementation results of LBP on two texture types - synthetic and natural textures - shows that extracted texture feature can be used as input for pattern classification.
Abstract: Local Binary Pattern (LBP) is a method that used to describe texture characteristics of the surfaces. By applying LBP, texture pattern probability can be summarised into a histogram. LBP values need to be determined for all of the image pixels. Texture regularity might be determined based on the distribution shape of the LBP histogram. The implementation results of LBP on two texture types - synthetic and natural textures - shows that extracted texture feature can be used as input for pattern classification. Euclidean distance method is applied to classify the texture pattern obtained from LBP computation.