The extremal index θ, a measure of the degree of local dependence in the extremes of a stationary process, plays an important role in extreme value analyses. We estimate θ semiparametrically, using the relationship between the distribution of block maxima and the marginal distribution of a process to define a semiparametric model. We show that these semiparametric estimators are simpler and sub...

introduction: extreme altitude travel has gained popularity globally for adventurous, scientific, and military endeavors. cerebral venous sinus thrombosis (cvst) at extreme altitude is a rare, covert, and emergent condition requiring immediate intervention. case presentation: a case of cvst masqueraded as high altitude cerebral edema (hace) at 6700 m/22000 ft in karakoram himalayas. atypical ol...

The sealness of wilayah is one of the most important and challenging issues discussed by Muslim mystics, and has been discussed by the likes of Ibn ‘Arabi. Like other mystics, Ibn ‘Arabi divides wilayah into two types: absolute and limited. However, his ideas with regards to instances of absolute wilayah and limited wilayah diverge from the norm. Sometimes th...

Crude oil markets are highly volatile and risky. Extreme value theory (EVT), an approach to modelling and measuring risks under rare events, has seen a more prominent role in risk management in recent years. This paper presents an application of EVT to the daily returns of crude oil prices in the Canadian spot market between 1998 and 2006. We focus on the peak over threshold method by analyzing...

<span>Risk management in software development has always been one of the necessities project management. The logical nature projects and products caused several challenges risks these projects. On other hand, with emergence Agile methodologies, especially Scrum, extreme programming (XP) recent years, this issue become more serious. This is mainly because emphasizing limited documentation ...

Value at Risk (VaR) is a tool widely used in financial applications to assess portfolio risk. The historical stock return data used in calculating VaR may be sensitive to rare news events that occur during the sampled period and cause trend disruptions. Therefore, in this paper, we measure the effects of various news events on stock prices. Subsequently, we identify irregular events using a Poi...

Considering a disastrous earthquake as a rare event, the aim of this study is to apply the proposed data construction method (DCM) to determine the possible distribution pattern of disastrous earthquakes in Taiwan. Owing to the availability of only a limited amount of data and based on the multiset division of DCM, virtual samples have been generated. The procedure is illustrated by a numerical...

Extreme value theory has emerged as one of the most important statistical disciplines for the applied sciences. Extreme value techniques are also becoming widely used in many other disciplines. For example, for portfolio adjustment in the insurance industry; for risk assessment on financial markets; and for traffic prediction in telecommunications. Here we do some basic data analysis in extreme...