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Search Results: 1 - 10 of 32492 matches for " John Salini "
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The extent of population genetic subdivision differs among four co-distributed shark species in the Indo-Australian archipelago
Jenny R Ovenden, Tom Kashiwagi, Damien Broderick, Jenny Giles, John Salini
BMC Evolutionary Biology , 2009, DOI: 10.1186/1471-2148-9-40
Abstract: Populations of four commercially harvested shark species (Carcharhinus obscurus, Carcharhinus sorrah, Prionace glauca, Sphyrna lewini) were sampled from northern Australia and central Indonesia. Neutral genetic markers (mitochondrial DNA control region sequence and allelic variation at co-dominant microsatellite loci) revealed genetic subdivision between Australian and Indonesian populations of C. sorrah. Further research is needed to address the possibility of genetic subdivision among C. obscurus populations. There was no evidence of genetic subdivision for P. glauca and S. lewini populations, but the sampling represented a relatively small part of their distributional range. For these species, more detailed analyses of population genetic structure is recommended in the future.Cooperative management between Australia and Indonesia is the best option at present for P. glauca and S. lewini, while C. sorrah and C. obscurus should be managed independently. On-going research on these and other exploited shark and ray species is strongly recommended. Biological and ecological similarity between species may not be a predictor of population genetic structure, so species-specific studies are recommended to provide new data to assist with sustainable fisheries management.The Indo-Australian archipelago is a biogeograhically complex region encompassing a series of continental shelves, volcanic mountainous islands and deep-sea trenches. The Indonesian section straddles the equator and extends about 5000 km from east to west. It has the world's highest marine endemism; including most the diverse sea-grass meadows, greatest expanses of mangroves and most extensive coral reef communities [1]. The Australian section is dominated by an extensive continental shelf extending offshore from three Australian state jurisdictions; Queensland, Northern Territory and Western Australia. As the world's fourth most populous nation, Indonesia has a high demand for food from the sea. The landed
PRONOSTICANDO EL íNDICE ENSO VARIOS PASOS EN ADELANTE MEDIANTE TéCNICAS DE MODELAMIENTO NO LINEAL
Salini Calderón,Giovanni;
Ingeniare. Revista chilena de ingeniería , 2010, DOI: 10.4067/S0718-33052010000300006
Abstract: we indicate how to handle a large database consisting of nonlinear time series, applying different nonlinear modelling techniques to this kind of times series. nowadays in the current references there is no explicit guide of how to manipulate data from nonlinear time series; however, there are approaches that can be taken account. to this end we studied a monthly database corresponding to south oscillation index (soi) and between the years 1886 to 2006. it explains how there must manipulated this database whose data possess nonlinear characteristic, which will be used to do forecasts several steps ahead. two standard tests to this database were applied, the average mutual information (ami) and the false nearest neighbours (fnn). the optimal spacing of the information was obtained as well as the number of values backward necessary to predict values towards the future. then, several models were designed of artificial neural nets (ann), with different learning rules, function of transfer, elements of process (or neurons) in the hidden layer, etc., that allowed to do forecasting of up to 20 steps ahead. the best networks were those that possessed the rules of learning called extdbd and delta-rule, and sigmoid as well as hyperbolic tangent as function of transfer. the type of used network was one of feedforward multilayer perceptron and trained by means of backpropagation technique. networks were proved by one, two hidden layers and without any hidden layer. the best model that was obtained it turned out to be one that consisted with an alone hidden layer.
PRONOSTICANDO EL íNDICE ENSO VARIOS PASOS EN ADELANTE MEDIANTE TéCNICAS DE MODELAMIENTO NO LINEAL FORECASTING ENSO SEVERAL STEPS AHEAD THROUGH NONLINEAR MODELING TECHNIQUES
Giovanni Salini Calderón
Ingeniare : Revista Chilena de Ingeniería , 2010,
Abstract: Se indica cómo manejar una gran base de datos consistente de series temporales no lineales, aplicando distintas técnicas de modelamiento no lineal a estas series. Aunque no existen guías explícitas de manipulación de series temporales no lineales en la profusa bibliografía actual, existen diferentes enfoques que pueden ser tomados en cuenta. Para ello se estudió una base de datos mensual correspondiente a datos del Fenómeno del Ni o (ENSO), entre los a os 1866 y 2006. Se explica cómo debe manipularse esta base de datos que poseen características de no linealidad, la cual será usada para hacer pronósticos varios pasos en adelante. Se aplicaron dos test estándar: Información Mutua Promedio (AMI) y Falsos Vecinos más Cercanos (FNN). Se obtuvo el espaciamiento óptimo de los datos, así como el número de datos hacia atrás necesarios para pronosticar valores hacia el futuro. Luego, se dise aron varios modelos de redes neuronales artificiales (RNA), con diferentes reglas de aprendizajes, funciones de transferencia, elementos de procesamiento (o neuronas) en la capa escondida, etc., que permitieron hacer pronóstico de hasta 20 pasos en adelante. Las mejores redes correspondieron a aquellas que poseían como regla de aprendizaje la Regla Delta y la Regla Extendida, con función de transferencia sigmoide y tangente hiperbólica. El tipo de RNA usada fue una de multicapas alimentada hacia adelante y entrenada mediante la técnica de propagación hacia atrás. Se probaron redes con una, dos capas ocultas y sin ninguna capa. El mejor modelo que se obtuvo resultó ser uno consistente de una capa oculta. We indicate how to handle a large database consisting of nonlinear time series, applying different nonlinear modelling techniques to this kind of times series. Nowadays in the current references there is no explicit guide of how to manipulate data from nonlinear time series; however, there are approaches that can be taken account. To this end we studied a monthly database corresponding to South Oscillation Index (SOI) and between the years 1886 to 2006. It explains how there must manipulated this database whose data possess nonlinear characteristic, which will be used to do forecasts several steps ahead. Two standard tests to this database were applied, the Average Mutual Information (AMI) and the False Nearest Neighbours (FNN). The optimal spacing of the information was obtained as well as the number of values backward necessary to predict values towards the future. Then, several models were designed of artificial neural nets (ANN), with different learning rules, function of
Corrections to the expected signal in quantum metrology using highly anisotropic Bose-Einstein Condensates
Salini Jose,Anil Shaji
Physics , 2013, DOI: 10.1103/PhysRevA.88.052312
Abstract: In the quantum metrology protocol described by Tacla et al. [Tacla et al., Phys. Rev. A 82, 053636 (2010)] where a two mode Bose-Einstein condensate (BEC) is used for parameter estimation, the measured quantity is to be obtained by doing a one parameter fit of the observed data to a theoretically expected signal. Here we look at different levels of approximation used to model the two mode BEC to see how the estimate improves when increasing level of detail is added to the theory while at the same time keeping the expected signal computable.
Monospecific bloom of noxious raphidophyte Chattonella marina in the coastal water of South West coast of India
Kunnatholickal Balakrishnan Padmakumar 1* , Lathika Cicily Thomas 1 , Thaliyakkattil Chandran Salini 1 , Elizabeth John 1 , Narayana Ravindranatha Menon 2 , Veloorkirakathil Narayana Sanjeevan 1
International Journal of Biosciences , 2011,
Abstract: A massive monospecific bloom of toxic marine raphidophyte Chattonella marina was observed off Kochi along the southwest coast of India during late September 2009 with very high cell density (1.59 x 107cells L-1) and wide spatial distribution. The tear drop shaped cells were 38-65 μm long, 25-30 μm wide and having large number of chloroplasts. Almost 90% of the phytoplankton population was composed of C. marina in the bloom area. Other phytoplankters were few in number represented by Skeletonema costatum,Rhizosolenia spp., Chaetoceros spp., Psuedo-nitzschia spp. etc. and among these Skeletonema costatum was dominant with cell density 2.3 x 104cells L-1. The concentration of photosynthetic pigment, chlorophyll a was 8.3 μg L-1in the bloom area. Toxicity test using the alcohol extracts of the Chattonellabloom samples showed characteristic neurotoxic symptoms in fishes leading to mortality.
Influence of Preventive Maintenance Policy on Manufacturing Systems Performances
Antonio C. Caputo,Paolo Salini
Lecture Notes in Engineering and Computer Science , 2009,
Abstract:
PPS DE REGIONALIZA O DO TURISMO NA REGI O DE BLUMENAU, SANTA CATARINA
Marialva Tomio Dreher,Talita Salini
Gest?o & Regionalidade , 2009,
Abstract: A regionaliza o é vista como uma forma de promover o potencial turístico da regi o de Blumenau, em Santa Catarina, ampliando e diversificando a atratividade e a oferta turística, de modo a atrairmaior demanda. Contudo, o entendimento e a participa o s o parciais, vislumbrados apenas em algumas políticas públicas (PPs) e na inten o de se participar do processo. Neste contexto, objetivou-se analisar, na regi o destacada, a abordagem da regionaliza o nas PPs de turismo e a percep o dos atores do setor sobre tais PPs, para provocar uma reflex o sobre as perspectivas de promo oda regionaliza o do turismo. Utilizou-se o método da pesquisa qualitativa, amparada pelas técnicas das pesquisas analítica e descritiva. Os instrumentos de coleta de dados foram a análise documental, a entrevista informal e a entrevista estruturada. Osresultados apresentam um cenário de discuss es e adapta o política. S o raras as PPs que abordam a regionaliza o como foco das diretrizes. Todavia, os entrevistados reconheceram a importancia daelabora o destas políticas, porém que elas ainda n o evidenciam a es efetivas.
Kimura′s disease: An uncommon cause of lymphadenopathy
Kumar Veerendra,Salini,Haridas Savida
Indian Journal of Medical and Paediatric Oncology , 2010,
Abstract: Lymph node enlargement of neck and axilla is one of the common presenting complaints in pediatrics. We are presenting here a very rare cause of axillary lymphadenopathy detected in a toddler.
Nonislet Cell Tumor Hypoglycemia
Johnson Thomas,Salini C. Kumar
Case Reports in Endocrinology , 2013, DOI: 10.1155/2013/308086
Abstract: Nonislet cell tumor hypoglycemia (NICTH) is a rare cause of hypoglycemia. It is characterized by increased glucose utilization by tissues mediated by a tumor resulting in hypoglycemia. NICTH is usually seen in large mesenchymal tumors including tumors involving the GI tract. Here we will discuss a case, its pathophysiology, and recent advances in the management of NICTH. Our patient was diagnosed with poorly differentiated squamous cell carcinoma of esophagus. He continued to be hypoglycemic even after starting continuous tube feeds and D5W. General workup for hypoglycemia was negative and insulin-like growth factor II (IGF II) was in the normal range. Hypoglycemia secondary to “big” IGF II was considered, and patient was started on steroids. His hypoglycemia resolved within a day of treatment with steroids. Initially patient had hypoglycemia unawareness, which he regained after maintaining euglycemia for 48 hours. 1. Introduction NICTH was first described by Nadler and Wolfer in a patient with hepatocellular carcinoma as early as 1929 [1]. In 1988, Daughaday et al. demonstrated that tumor-induced hypoglycemia was associated with abnormal pro-IGF II (“big” IGF II) acting via the insulin receptor [2]. Being a rare disease, the true incidence of NICTH is not known. But it is estimated to be one per million people years [3]. Most common cancers causing NICTH are tumors of the GI tract, lungs, pancreas, adrenal, and ovary. Table 1 [3–5] shows the list of tumors associated with NICTH. Table 1: Tumors associated with NICTH. 2. Case Report A 63-year-old Caucasian male with poorly differentiated squamous cell carcinoma of esophagus diagnosed 45 days ago with metastasis to lung and liver came to emergency room with dizziness. His fingerstick glucose was 27?mg/dL in the emergency room with corresponding plasma glucose of 19?mg/dL despite PEG tube feeding with Pivot 1.5 at 20?mL/hr. Patient was started on D5W at 100?mL/hr and admitted to medicine floor. He denied previous history of diabetes or use of oral hypoglycemic agents and insulin. He was not on steroids prior to admission. On physical examination, vitals were within normal limits. Positive findings included right upper quadrant mass and PEG tube. No leak from PEG tube was appreciated. Patient continued to be hypoglycemic while on D5W and Pivot. During these hypoglycemic episodes, patient denied dizziness, diaphoresis, palpitation, chest pain, tremor, or weakness. Patient was also conscious and fully awake even when his blood glucose was below 30?mg/dL. Patient’s feed was changed to Jevity (1.5?Cal/mL) at
Sonographic evaluation of the shoulder in asymptomatic elderly subjects with diabetes
Michele Abate, Cosima Schiavone, Vincenzo Salini
BMC Musculoskeletal Disorders , 2010, DOI: 10.1186/1471-2474-11-278
Abstract: The study was performed on 48 subjects with diabetes and 32 controls (mean age: 71.5 ± 4.8 and 70.7 ± 4.5, respectively), who did not complain shoulder pain or dysfunction. An ultrasound examination was performed on both shoulders according to a standard protocol, utilizing multiplanar scans.Tendons thickness was greater in diabetics than in controls (Supraspinatus Tendon: 6.2 ± 0.09 mm vs 5.2 ± 0.7 mm, p < 0.001; Biceps Tendon: 4 ± 0.8 mm vs 3.2 ± 0.4 mm, p < 0.001). Sonographic appearances of degenerative features in the rotator cuff and biceps were more frequently observed in diabetics (Supraspinatus Tendon: 42.7% vs 20.3%, p < 0.003; Biceps Tendon: 27% vs 7.8%, p < 0.002).Subjects with diabetes exhibited more tears in the Supraspinatus Tendon (Minor tears: 15 (15.8%) vs 2 (3.1%), p < 0.03; Major tears: 15 (15.8%) vs 5 (7.8%), p = ns), but not in the long head of Biceps. More effusions in subacromial bursa were observed in diabetics (23.9% vs 10.9%, p < 0.03) as well as tenosynovitis in biceps tendon (33.3% vs 10.9%, p < 0.001).In both groups, pathological findings were prevalent on the dominant side, but no difference related to duration of diabetes was found.Our results suggest that age - related rotator cuff tendon degenerative changes are more common in diabetics.Ultrasound is an useful tool for discovering in pre - symptomatic stages the subjects that may undergo shoulder symptomatic pathologies.Several sonographic studies, performed in the general population, show that the prevalence of rotator cuff tears increases with age. The prevalence of tears ranges widely, roughly from 0 - 15% in the 60 s to 30 - 50% in 80 s, these differences being explained by characteristics of subjects enrolled and sonographic criteria by which lesions were identified [1-9].Magnetic Resonance Imaging is a more sensitive methodology than ultrasound (US) in detecting pathological changes in asymptomatic shoulders. However, its use for epidemiological purposes is limited by higher c
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