Common Environmental Effects on Quantum Thermal Transistor

Quantum thermal transistor is a microscopic thermodynamical device that can modulate and amplify heat current through two terminals by the weak heat current at the third terminal. Here we study the common environmental effects on a quantum thermal transistor made up of three strong-coupling qubits. It is shown that the functions of the thermal transistor can be maintained and the amplification rate can be modestly enhanced by the skillfully designed common environments. In particular, the presence of a dark state in the case of the completely correlated transitions can provide an additional external channel to control the heat currents without any disturbance of the amplification rate. These results show that common environmental effects can offer new insights into improving the performance of quantum thermal devices.

Macroscopic Aspects of the Cranial Mesenteric Artery (Arteria Mesenterica Cranialis) in Chinchilla Lanigera Species

In this study we have used 10 carcasses of chinchilla females slaughtered by the owner for commercial purposes. The studied animals have been subjected to an antemortem exam in which the semiological constants like: temperature; breats per minute and pulse were recorded. After the examination the subjects were declared clinically healthy. After skinning 30 ml coloring agent was injected intraluminally and dissection of the cranial mesenteric artery was performed. The first collateral branch of this vessel was the caudal pancreatico-duodenal artery (Arteria pancreaticoduodenalis caudalis), followed by 4-5 jejunal arteries (Arteriae jejunales). The cranial mesenteric artery gives off the dorsal cecal artery (Arteria cecalis dorsalis) as one of terminal branches to supply the haustrated part of cecum, the medial cecal artery (Arteria cecalis media) distributed to the tubular part of cecum (second terminal) and ileocolic artery (Arteria ileocolica)(the third terminal). To the best of our knowledge, our results brings significant information about the blood supply of intestines in chinchilla, that could be a real help for clinicians and researchers studying this topic.

HEAT SWITCH AND MODULATOR: A MODEL OF THERMAL TRANSISTOR

A model of a thermal transistor to control heat flow is reported. Like its electronic counterpart, the thermal transistor is a three-terminal device with the important feature that the heat current through two terminals can be switched or modulated by the temperature of the third terminal. The thermal transistor model is possible because of the negative differential thermal resistance.

Self-mourning in Paradise: Writing (about) AIDS through Death-bed Delirium

This article discusses the representation of AIDS in Guibert's posthumously published novel Le Paradis (Paradise). The novel is situated in relation to Guibert's better known previous AIDS writings. The article proposes that Guibert's AIDS works fall in to three related categories: writings about other peoples' AIDS; autobiographical writings about AIDS, and, in the third, terminal stage in which Le Paradis fits, writing (about) AIDS. As such the article suggests that Le Paradis manages to reflect and communicate some of the trauma of living with AIDS by specifically trying not to write about it. The article raises issues related to constructions of sexualized and AIDS identities in fiction, and presents the novel as a form which represents a loss of self. The novel, it is argued, becomes a self-mourning for a healthy past which is memorialized in a fictional present, itself always-already haunted by the nostalgia for a lost future.

AN IMPROVED DIFFERENTIAL COMPARATOR WITH FIELD EFFECT DIODE OUTPUT STAGE

In a field effect diode, carriers of a p–n junction can be modulated on-line. The p and n regions are created by two oppositely biased, and closely spaced, gates in CMOS SOI technology. Using gates as the third terminal, the field effect diode can operate as a switch or as an amplifying element. In this paper, a conventional differential comparator is designed and its performance is compared with a circuit which uses field effect diodes in its output stage. It is shown that the large current sinking and supplying capability of the field effect diode causes this comparator to operate faster than the conventional circuit, consumes less power and covers less chip area.

Preparation and Structures of Ternary Copper(II) Complexes of ADP and ATP Models for Enzyme-Metal Ion-Nucleoside Polyphosphate Complexes

The stable ternary copper(II) complexes of ATP and ADP, [Cu(H2ATP)(phen)]2 · 7 H2O (2) and [Cu4(HADP)2(bipy)4(H2O)2(NO3)2] · 2 NO3 (3), have been isolated from aqueous solution at respective pH values of 2.8 and 4.0. Their structures have been established by single crystal X-ray diffraction. Tridentate coordination of each of the Cu atoms by ono α-, one β- and one γ-phosphate O atom of one ATP molecule is observed in 2. The binding Oα atoms occupy axial positions in a distorted octahedral geometry at Cu and the Cu- Oα interactions are weak. The other axial position is occupied by a γ-phosphate O atom of the second ATP molecule, leading to a dimeric structure. The basic structure of 3 is similar with, in this case, bidentate coordination of each of the central Cu atoms by one α- and one β-phosphate O atom of ono ADP molecule. In this case, however, the third terminal β-phosphate O atoms each bind a further Cu atom. All four Cu atoms in 3 display square pyramidal coordination. The structures of 2 and 3 are stabilised by intramolecular stacking of adenine and phenanthroline/bipyridyl systems. The significance of these structures as models for enzyme-metal ion-nucleoside polyphosphate complexes is discussed.

Ultrastructure of a terminal chordotonal sensillum in larval antennae of the yellow mealworm, Tenebrio molitor L.

The third (terminal) segment of the antenna of the final instar larva of Tenebrio molitor contains a single, unusually positioned and attached chordotonal sensillum. This sensillum consists of four cells: a microtubule-filled attachment cell anchoring the sensillum in the basement membrane-like extracellular matrix of the segment, a scolopale cell containing a strongly developed fibrous scolopale ensheathing the dendrite, a typical type I bipolar neuron, and a basal glial cell. The ultrastructure of this sensillum and its relationships to other antennal structures are described and compared with other chordotonal sensilla reported in the literature.