We consider the solution of the large-scale nonsymmetric algebraic Riccati equation XCX − XD − AX + B = 0, with M ≡ [D,−C;−B,A] ∈ R(n1+n2)×(n1+n2) being a nonsingular M-matrix, and A,D being sparse-like (with the products A−1v, A−>v, D−1v and D−>v computable in O(n1) or O(n2) complexity, for some vector v) and B,C are low-ranked. The structure-preserving doubling algorithm by Guo, Lin and Xu (2...

This paper presents a CMOS RF receiver frontend suitable for ultra-low-power operation. In order to achieve desired gain and linearity of receiver front-end at a 1V supply voltage, current reuse and optimum gate biasing techniques are employed. The proposed architecture includes merged LNA and mixer, operating in the sub-threshold region, and designed for the 902-928MHz ISM band. The proposed c...

A 3 AIS-Impute (proposed algorithm). Require: partially observed matrix O, parameter λ, decay parameter ν ∈ (0, 1), threshold ; 1: [U0, λ0, V0] = rank-1 SVD(PΩ(O)); 2: c = 1, ̃0 = ‖PΩ(O)‖F , X0 = X1 = λ0U0V > 0 ; 3: for t = 1, 2, . . . do 4: ̃t = ν̃0; θt = (c− 1)/(c+ 2); 5: λt = ν(λ0 − λ) + λ; 6: Yt = Xt + θt(Xt −Xt−1); 7: Z̃t = Yt + PΩ(O − Yt); 8: Vt−1 = Vt−1 − Vt(VtVt−1), remove zero columns; ...

When two speech signals are mixed in a single channel the voiced parts of any of them remain mostly unaltered during the voicing interruptions of the other, i.e. pauses and voiceless consonants. The mixture is made of 3 types of multivoiced segments noted 0V (unvoiced), 1V (one voicing) and 2V (two voicings). A statistical study of readaloud texts reveals that total time spent in the 1V state i...

A new design of level-up and level-down shifter for low-power and high speed applications has been presented. Level-up and level-down operations can be perform by using the new well-organized Transmission gate Voltage Level Shifter (TVLS). In this paper a novel voltage level shifter have introduced that performs level-up shift or level-down shifts. In this, the circuit watch its input logic vol...

BACKGROUND The objective was to describe patients presenting themselves at emergency-care settings following a suicide attempt in eight culturally different sites [Campinas (Brazil), Chennai (India), Colombo (Sri Lanka), Durban (South Africa), Hanoi (Viet Nam), Karaj (Iran), Tallinn (Estonia), and Yuncheng, (China)]. METHOD Subjects seen for suicide attempts, as identified by the medical staf...

OBJECTIVE The objective of the present study is to evaluate the characteristics of acute poisoning cases admitted to emergency department over a one year period. The demographic, clinical and psycho-social aspects of the patients were analysed. MATERIALS AND METHODS A hospital based study was carried out in the emergency department, Kathmandu University Teaching Hospital/ Dhulikhel Hospital, ...

Poisoning by pesticides and other agricultural chemicals is a major public health problem worldwide, especially in developing countries. Globally, there are about 20,000 annual fatalities and more than 2 million hospitalizations due to poisoning by pesticides and agricultural chemicals.1 There were approximately 340,000 cases of agricultural and horticultural poisoning reported in the United St...

Shellfish toxins are the most dangerous marine biotoxins, and produced by free living micro-algae. Shellfish toxins are concentrated in flesh, and poisoning occurs when these contaminated shellfish is consumed. They can cause paralytic shellfish poisoning (PSP), diarrhetic shellfish poisoning (DSP), neurotoxic shellfish poisoning (NSP), amnesic shellfish poisoning (ASP) and azaspiracid shellfis...