introduction: the aim of this case report was to investigate the relationship between sleep disorders and audio vestibular symptoms.   case report: a case of undiagnosed sleep disorder, presenting as a temporary auditory processing difficulty, is presented. the disorder was initially treated as sudden deafness with dizziness. a 23-year-old male patient complained of acute hearing disturbance de...

In this paper, a disturbance observer based controller is proposed for the compensation of nonlinear friction in a servodrive system. The designed nonlinear controller uses the estimated system states (position, velocity) and disturbance to enhance tracking performance of the servodrive using high stiff gains for the compensation of the effects of nonlinear friction. The effectiveness of this d...

background: electrolytes play an important role in the normal functioning of human body. electrolyte imbalance and mineral disturbances is the common clinical manifestation in several infectious diseases including malaria. malaria is a mosquito borne serious infectious disease of the world. plasmodium vivax and p. falciparum are the main agents responsible for malaria in pakistan. electrolyte i...

as one of the most promising distributed generation (dg) sources, wind power technology has been widely developed in recent years. doubly fed induction generator (dfig) is currently employed as one of the most common topologies for wind turbine generators (wtgs). this generator operates as a synchronous/asynchronous hybrid generators. therefore, it is necessary to power engineers find understan...

abstract background: an association of eating disorder with diabetes mellitus may lead to a serious lack of metabolic control, higher mortality and morbidity. there is no recent study conducted in the iranian population about eating disorder and its variants. the aim of the present study is investigation of frequency of disturbed eating behaviors in adolescent girls with type 1 diabetes mellitu...

this paper proposes a new method for parameter estimation of distorted single phase signals, through an improved demodulation-based phase tracking incorporated with a frequency adaptation mechanism. the simulation results demonstrate the superiority of the proposed method compared to the conventional sogi (second-order generalized integrator)-based approach, in spite of the dc-offset and harmon...

background: sleep apnea is temporary cessation or absence of breathing during sleep. significant increase in blood pressure is clinically seen in apneic episodes. the aim of this study was to examine sleep apnea syndrome as a risk factor for non- arthritic anterior ischemic optic neuropathy (naion) in a case control study. methods: nineteen naion patients (9 men and 10 women) and 31 age and sex...

An influential ecological theory, the intermediate disturbance hypothesis (IDH), predicts that intermediate levels of disturbance will maximize species diversity. Empirical studies, however, have described a wide variety of diversity-disturbance relationships (DDRs). Using experimental populations of microbes, we show that the form of the DDR depends on an interaction between disturbance freque...

Whether biological diversity within communities is limited by local interactions or regional species pools remains an important question in ecology. In this paper, we investigate how an experimentally applied tree-harvesting disturbance gradient influenced local-regional richness relationships. Plant species richness was measured at three spatial scales (2 ha = regional; 576 m2 and 1 m2 = local...