In this paper a self-startup DC-DC boost converter for thermal energy harvesting applications is presented. A startup circuit boosts an internal supply voltage using low generated from thermoelectric generator to operate the circuitry of converter. To reduce power dissipation, disabled after operation finished. boosted output obtained by alternating auxiliary and main voltage. The has been impl...

The prototype of an artificial molecular machine consisting of a trisammonium tricationic component interlocked with a tris(crown ether) component to form a molecular bundle with averaged C(3v) symmetry has been designed and synthesized. The system is based on noncovalent interactions, which include 1) N(+)-H...O hydrogen bonds; 2) C-H...O interactions between the CH(2)NH(2) (+)CH(2) protons on...

In human erythrocytes (h-RBCs) various stimuli induce increases in [cAMP] that trigger ATP release. The resulting pattern of extracellular ATP accumulation (ATPe kinetics) depends on both ATP release and ATPe degradation by ectoATPase activity. In this study we evaluated ATPe kinetics from primary cultures of h-RBCs infected with P. falciparum at various stages of infection (ring, trophozoite a...

In space and astrophysical plasmas turbulence leads to the development of coherent structures characterized by a strong current density important magnetic shears. Using hybrid-kinetic simulations (3D with different energy injection scales) we investigate these characterize their shape. First, present methods estimate overall shape 3D structure using local measurements, foreseeing application on...

A series of tribenzotriquinacene derivatives bearing three oxy-functionalised alkyl groups at the benzhydrylic bridgeheads (C-4b, C-8b and C-12b) have been synthesised. The 4b,8b,12b-triallyl derivative was used to generate the corresponding TBTQ-tris-acetaldehyde and TBTQ-tris(acetic acid), in which the functional groups stretch out from the convex rigid molecular surface. The corresponding tr...

This paper presents a fully integrated 5.4-GHz CMOS Voltage-controlled Oscillator (VCO) with a low phase noise and ultra linear VCO gain (Kvco) in 0.35-μm SiGe (Silicon Germanium) BiCMOS technology. In order to increase the linearity of the VCO, a resonant circuit is proposed that consists of four parallel p-n junction varactor pairs. The VCO operate at a bias current of 3.13 mA and a supply vo...

Reliable values of thermal conductivity of thin films made of GaN and its alloys are important for further development of nitride technology due to the problem of self-heating in GaN-based power transistors and optical devices. Using the differential 3v technique we measured the thermal conductivity of AlxGa1−xN thin films (x=0 and 0.4) grown by the hydride vapor phase epitaxy. Thermal conducti...

Design trade-offs for a low-voltage two-stage amplifier in the HP CMOS14 process are presented and some of the issues of low-voltage analog design are discussed. The design of a new constant-transconductance input stage that has a rail-to-rail common-mode input range is described, along with the rail-to-rail class-AB output stage. The performance specifications and area of this amplifier are co...

Studies were performed on the cremaster skeletal muscle in rats to investigate the microvascular changes that are associated with established one-kidney, one clip (1K1C) and two-kidney, one clip (2K1C) Goldblatt hypertension and with deoxycorticosterone (DOC)-salt hypertension. Rats were anesthetized with urethane and chloralose; and cremaster muscles with intact circulation and innervation wer...

Introduction The aim of this note is to provide a Steiner triple system STS( v ) which admits a partition into v STS( v) for every v 1 or 3 (mod 6). The STS( v ) obtained in this way will also contain ~v( v 1) subsystems of order 3v. An analogous construction is provided of an S(2, 4, v ) with a partition into v S(2, 4, v)'s in the case v 1 (mod 12). The Steiner system constructed here will als...