In this paper asymptotic confidence intervals for the Sortino and Omega Ratio are proposed and analyzed. First the confidence intervals are derived under the strong assumption of temporal independence and identical distribution of the returns. Later they are obtained assuming that the process followed by returns is strictly stationary and α-mixing of a certain size. In order to evaluate the min...

There is evidence that the ratio of the length of the 2nd and 4th digit (2D:4D) is negatively related to prenatal and adult concentrations of testosterone. It has also been reported that high levels of testosterone at conception in both fathers and mothers are associated with an increased sex ratio (proportion of males at birth). It follows from these observations that low values of 2D:4D may b...

Dongcao muscovite granite, as the product of second stage magmatic intrusion Ganfang composite pluton, is closely related to mineralization Li–Nb–Ta rare metals in Yifeng area. This paper aims discuss diagenetic age, evolutionary process, and relationship with metal granite by using petrographic, cassiterite U–Pb dating geochemical analyses. Petrographic analysis shows that lithology medium– fi...

Abstract Rubidium (Rb) deposits mostly occur in the South China and Central Asia orogenic belts are often closely associated with highly differentiated granites. This study aimed to investigate a newly discovered giant Rb deposit at Gariatong Lhasa terrane Tibet. Detailed field studies logging data revealed that mineralization mainly occurrs monzogranite is related greisenization. LA‐ICP‐MS U‐P...

This research is motivated by differences in the results of previous studies regarding Effect Current Ratio (CR), Quick (QR), Debt To Asset (DAR), and Equity (DER) on Return On Assets (ROA) Companies Pharmaceutical Sub-Sector Listed Indonesia Stock Exchange for 2015-2019 Period. study aims to determine effect (ROA). uses several data analyzes, namely descriptive analysis, model selection test, ...

Odds ratio, risk ratio, and prevalence ratio are some of the measures of association which are often reported in research studies quantifying the relationship between an independent variable and the outcome of interest. There has been much debate on the issue of which measure is appropriate to report depending on the study design. However, the literature on selecting a particular category of th...

this study was designed to present and compare iranian hospitals` performance applying ratio analysis technique.this cross-sectional survey was conducted to present an instant image of 139 iranian hospitals` performance status applying ratio analysis as one of the non parametric technical efficiency assessment methods in 2008. data was collected using nine dimensional questionnaires supported b...

alcohol oxidation is an important reaction in organic syntheses. some of these reactions must beunder difficult conditions in respect of high temperature and pressure. in many cases, reactions areconducted by environmentally in appropriate solutions. in this study, preparing an effectivenanocatalyst and estimating the optimum provisions of its production processes are assessed. twomajor and cru...