In this paper, Tow Thomas universal filter based on current controlled conveyor (CCCII) is presented. The proposed configuration utilizes six CCCII-s, two grounded capacitors and two grounded resistors. The circuit enjoys a number of advantages: composed of solely minus type of current conveyors, offers high input impedance, uses all grounded passive components, independent electronic control o...

We evaluated two novel, portable microscopes and locally acquired, single-ply, paper towels as filter paper for the diagnosis of Schistosoma haematobium infection. The mobile phone-mounted Foldscope and reversed-lens CellScope had sensitivities of 55.9% and 67.6%, and specificities of 93.3% and 100.0%, respectively, compared with conventional light microscopy for diagnosing S. haematobium infec...

This paper is to construct tight wavelet frame systems containing a set of canonical filters by applying the unitary extension principle of [20]. A set of filters are canonical if the filters in this set are generated by flipping, adding a conjugation with a proper sign adjusting from one filter. The simplest way to construct wavelets of s-variables is to use the 2−1 canonical filters generated...

For equiripple filters, the relation among the filter length N + 1, the transition bandwidth !, and the optimal passband and stopband errors p and s has been a secret for more than 20 years. This paper is aimed at solving this mystery. We derive the exact asymptotic results in the weightfree case p = s = , which enables us to interpret and improve the existing empirical formulas. Our main resul...

We evaluated two novel, portable microscopes and locally acquired, single-ply, paper towels as filter paper for the diagnosis of Schistosoma haematobium infection. The mobile phone-mounted Foldscope and reversed-lens CellScope had sensitivities of 55.9% and 67.6%, and specificities of 93.3% and 100.0%, respectively, compared with conventional light microscopy for diagnosing S. haematobium infec...

Respiration induces significant movement of tumours in the vicinity of thoracic and abdominal structures. Real-time image-guided radiotherapy (IGRT) aims to adapt radiation delivery to tumour motion during irradiation. One of the main problems for achieving this objective is the presence of time lag between the acquisition of tumour position and the radiation delivery. Such time lag causes sign...

Research on mathematical disorders and their brain mechanisms has a long tradition. This paper presents the history of the search for the mechanisms of aquired acalculia from the perspective of clinical neuropsychology. The classic typologies of this disorder formed by Berger and Hecaen are discussed, as well as modern trends in the research on specific arithmetic difficulties in children. The ...