Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV

Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV

Peer reviewe

Measurement of the top quark mass using charged particles in pp collisions at root s=8 TeV

Peer reviewe

Search for anomalous couplings in boosted WW/WZ -> l nu q(q)over-bar production in proton-proton collisions at root s=8TeV

Peer reviewe

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Pequil oil: effect of heating to temperature of frying and use as ingredients in the formulation of mayonnaise

Made available in DSpace on 2014-07-29T16:16:34Z (GMT). No. of bitstreams: 1 Dissertacao Mara Lina Rodrigues.pdf: 1679096 bytes, checksum: 308c719119950d1e6107c21908b6c241 (MD5) Previous issue date: 2011-06-28Pequi is a fruit typical of the brasilian savanna and among the nutrients found in the internal mesocarp, the lipids are present in higher percentage. Due to the presence of carotenoid pigments, notorius as antioxidants, pequi oil has red-orange color. Among these carotenoids found beta-carotene, that has also pro-vitamin A activity. The mayonnaise, emulsion oil-inwater, is the sauce whith high lipids content more appreciated and consumed in the world. This research aimed to evaluate the effect of heating frying temperature with different exposure times on the characteristics of pequi oil and make mayonnaise substituting soybean oil for the oil pequi. To evaluate the effect of heating the pequi oil heat treated at frying temperature (180 ° C) between 0 and 60 minutes. There were the analysis of free fatty acid content, peroxide value, iodine value, TBA index, density, viscosity, fatty acid profile, total carotenoids expressed as ß-carotene and color. With the results of this analysis, its determine the kinetics of degradation of carotenoids and of color change. The content of free fatty acids, peroxide value, iodine value, thiobarbituric acid index, density and viscosity have not been many changes during this period. The content of carotenoids was almost all degraded, and consequently, the color was changed significantly. The kinetics of degradation of carotenoids and of color change reflected the visual observations of samples of pequi oil obtained after each treatment. The pequi oil showed good stability over the 60 minutes and is indicated for the realization of frying processes during this period. To make the mayonnaise used the same formulation, varying only the lipid fraction between soybean oil and pequi oil, which were previously characterized. The mayonnaise was produced by homogenization in a mixer and packed in polyethylene terephthalate jars. the chemical composition and microbiological evaluation were determined for characterization of mayonnaise. The pH, water activity, color, stability, microscopy, firmness, consistency, adhesiveness and work of adhesion were performed at 0, 7, 14, 28 and 56 days of storage. The results showed that the initial stability of mayonnaise pequi oil was lower than soybean oil mayonnaise, but over time of storage, reached a similar percentage that of soybean oil mayonnaise. In general, the characteristics of mayonnaise made with pequi oil were consistent with those of mayonnaise made with soybean oil and microphotographs confirmed the perceived changes over the 56 days of analysis. As the mayonnaise is a frequent food consumption among different age groups and economic classes, the use of pequi oil for the manufacture of this product is an alternative to reach the recommended daily intake of ß-carotene (pro-vitamin A), leveraging can also contribute to the sustainable development of the brasilian savanna.O pequi é um fruto típico da região do cerrado e dentre os nutrientes encontrados no mesocarpo interno, os lipídios estão presentes em maior percentual. Devido à presença dos pigmentos carotenóides, conhecidos como antioxidantes, o azeite de pequi possui coloração vermelho-alaranjada. Dentre esses carotenóides encontra-se o ß-caroteno, que possui ainda atividade pró-vitamina A. A maionese, emulsão do tipo óleo em água, é um molho com alto teor de lipídios muito apreciado e consumido em todo o mundo. Esta pesquisa teve como objetivo avaliar o efeito do aquecimento em temperatura de fritura com diferentes tempos de exposição nas características do azeite de pequi e produzir maionese substituindo o óleo de soja pelo azeite de pequi. Para avaliar o efeito do aquecimento, o azeite de pequi tratado termicamente em temperatura de fritura (180 oC) entre 0 e 60 minutos. Realizaram-se as análises de teor de ácidos graxos livres, índice de peróxido, índice de iodo, índice de TBA, densidade, viscosidade, perfil de ácidos graxos, carotenóides totais expressos em ß-caroteno e cor. Com os resultados dessas análises, determinaram-se os parâmetros cinéticos da degradação dos carotenóides e de alteração da cor. O teor de ácidos graxos livres, índice de peróxido, índice de iodo, índice de ácido tiobarbitúrico, densidade e viscosidade não sofreram muitas alterações nesse período. O teor de carotenóides foi praticamente todo degradado, e consequentemente, a cor foi bastante alterada. As cinéticas de degradação dos carotenóides e de alteração da cor refletiram nas observações visuais das amostras do azeite de pequi obtidas depois de cada tratamento. O azeite de pequi apresentou boa estabilidade ao longo dos 60 minutos, sendo indicado para a realização de processos de frituras durante esse período. Para produzir as maioneses utilizou-se a mesma formulação variando apenas a fração lipídica entre óleo de soja e azeite de pequi, que foram previamente caracterizados. As maioneses foram elaboradas por homogeneização em liquidificador e acondicionadas em potes de polietileno tereftalato. Determinou-se a composição centesimal e a avaliação microbiológica para caracterização das maioneses. As análises de pH, atividade de água, cor, estabilidade, microscopia, firmeza, consistência, adesividade e trabalho de adesão foram realizadas nos tempos 0, 7, 14, 28 e 56 dias de estocagem. Os resultados revelaram que no período inicial a estabilidade da maionese de azeite de pequi foi menor que a de maionese de óleo de soja, mas ao longo do tempo de estocagem, alcançou percentual semelhante ao da maionese de óleo de soja. De maneira geral, as características da maionese elaborada com azeite de pequi foram compatíveis com as da maionese elaborada com óleo de soja e as microfotografias refletiram as variações percebidas ao longo dos 56 dias de análise. Como a maionese é um alimento de consumo freqüente entre as diferentes faixas etárias e classes econômicas, a utilização do azeite de pequi para a elaboração desse produto é ainda uma alternativa para a ingestão de ßcaroteno (pro-vitamina A), podendo também contribuir no desenvolvimento sustentável da região dos cerrados