Correlations and fluctuations of a confined electron gas

The grand potential $\Omega$ and the response $R = - \partial \Omega /\partial x$ of a phase-coherent confined noninteracting electron gas depend sensitively on chemical potential $\mu$ or external parameter $x$. We compute their autocorrelation as a function of $\mu$, $x$ and temperature. The result is related to the short-time dynamics of the corresponding classical system, implying in general the absence of a universal regime. Chaotic, diffusive and integrable motions are investigated, and illustrated numerically. The autocorrelation of the persistent current of a disordered mesoscopic ring is also computed.Comment: 12 pages, 1 figure, to appear in Phys. Rev.

Nonterminal incorporation of guanosine monophosphate from guanosine triphosphate by an enzyme system from spinach chloroplasts

This article does not have an abstract

Structure of Complexes of 2-Phenylazopyridine with Perchlorate Halides of Ni(II) & with Ferrous Iodide

166-16

Rapid Frequency Response From Smart Loads in Great Britain Power System

postprin

Estimation of aggregate reserve with point-of-load voltage control

Voltage dependent loads can collectively provide a certain amount of power reserve (by virtue of the ability to change their power consumption within the stipulated voltage tolerance) which could be exploited for grid frequency regulation through voltage control at the substation/feeder or at the point of load. The amount of such power reserve would vary with time of the day depending on the incidence of different types of voltage dependent loads and also the voltage profile across the feeders. It is important for the grid operators to know the aggregate power reserve from the voltage dependent loads during different times of the day in order to schedule other forms of reserves accordingly. This paper presents a methodology to estimate such power reserve from the measured power and voltage at the bulk supply points without knowing the actual distribution network topology and/or load profile of individual customers. The proposed method is applied to estimate the time variation of the aggregate reserve offered by the voltage dependent loads within the domestic sector in Great Britain (GB). Studies on a standard IEEE distribution network are presented to validate the estimated reserve margins under typical voltage profiles across the distribution feeders

A Study of drug utilization pattern in gynaecology out-patient department of a tertiary care hospital

Background: Gynaecological diseases are common in India because of socioeconomic, hygienic and literacy problems. Gynaecological drugs are one of the strong selling drugs in pharmaceutical market. Drug utilization research facilitate appropriate use of drugs in patient, minimize the adverse event and lead to better patient outcome. So, the present study was carried out to examine the patterns of drug prescription.Methods: A retrospective, observational study was done by collecting the prescriptions of the patients who attended the Gynaecology out-patient department in our institute for the period of six months. Total 300 prescription were collected and analysed. Patient’s demographic data, total number and category of drugs prescribed, percentage of individual drug and their dosage forms, drugs prescribed by generic name, brand names and percentage of drugs prescribed from essential drug list were analysed.Results: The mean age of presentation was 36.6±10.98 years. Among infective group breast abscess were common and among non-infective cases dysmenorrhea was most common. Out of 754 drugs prescribed, minerals were most commonly prescribed (42.70%) followed by antimicrobials (24.53%). Tablet form were prescribed more commonly (96.02%) followed by capsules (2%) and injections (1.06%). The average no. of drugs per prescription was 2.51±1.26 SD. Percentage of drugs prescribed by generic name were 98.01% and drugs prescribed from essential drug list were 85.41%.Conclusions: The overall drug use pattern in our study correlates with various gynaecological diseases. Majority of the women from rural background depend on primary health services for gynaecological diseases in their areas so, strengthening of gynaecological health care services reduce the morbidity among the women from rural areas.

Small Signal Stability Analysis of Distribution Networks with Electric Springs

This paper presents small signal stability analysis of distribution networks with electric springs (ESs) installed at the customer supply points. The focus is on ESs with reactive compensation only. Vector control of ES with reactive compensation is reported for the first time to ensure compatibility with the standard stability models of other components such as the interface inverter of distributed generators (DGs). A linearized state-space model of the distribution network with multiple ESs is developed which is extendible to include inverter-interfaced DGs, energy storage, active loads etc. The impact of distance of an ES from the substation, proximity between adjacent ESs and the R/X ratio of the network on the small signal stability of the system is analyzed and compared against the case with equivalent DG inverters. The collective operation of ESs is validated through simulation study on a standard distribution network

New Binuclear Nickel(II) Species

785-78

AC conductivity analysis for a metal core-silver orthosilicate shell nanostructure

Nanocomposites containing silver particles of diameter of 20 nm with silver orthosilicate crystals forming the shell with thickness around 21 nm closely packed in a silicate glass were prepared. The ac conductivity of samples subjected to different heat treatments were measured over the frequency range of 100 Hz to 6 MHz in the temperature range of 500-570 K. The data were analyzed by the Macdonald model based on Kohlrausch-related frequency response formalism designated as CK0. The reference system was taken as the glass-crystal composite containing a lithium orthosilicate crystalline phase. The shape parameter βo for the reference system was found to be 0.33, whereas that for the nanocomposites was extracted to be 0.46. The former implied a one-dimensional lithium ion motion along the grain boundaries of the orthosilicate crystals, whereas the latter indicated that there was a one-dimensional silver ion motion in an effective two-dimensional structure in the shell surface because of a high stress condition along the radial direction of the core-shell composite

Bis{μ-2-[(dimethyl­amino)­meth­yl]benzene­tellurolato}bis­[chlorido­palladium(II)] dichloro­methane hemisolvate

The asymmetric unit of the title compound, [Pd2(C9H12NTe)2Cl2]·0.5CH2Cl2, contains two half-mol­ecules, each lying on a twofold rotation axis; each mol­ecule is chiral and of the same enanti­omer. This is only possible as the mol­ecule has a hinged cis arrangement about the Pd2+ coordination spheres. For this hinged dimeric structure, the angles between the two coordination planes in each mol­ecule are 21.59 (4) and 22.10 (4)°. This hinged cis arrangement also allows the two mol­ecules to form pairs linked by secondary inter­actions between the Pd and Te atoms of an adjoining mol­ecule, leading to a tetra­meric overall structure. C—H⋯Cl inter­actions consolidate the crystal packing