A general procedure for constructing conserved electromagnetic current operators, for both finite and infinite degree of freedom systems, is given. A four-momentum operator consisting of matter, photon, and electromagnetic interactions is assumed to be polynomial in photon creation and annihilation operators. Commutators of the four-momentum operator with the four-vector potential operator at t...

We present a unitary correlation operator that explicitly induces into shell model type many-body states short ranged two-body correlations caused by the strong repulsive core and the pronounced tensor part of the nucleon-nucleon interaction. Alternatively an effective Hamiltonian can be defined by applying this unitary correlator to the realistic nucleon-nucleon interaction. The momentum space...

OBJECTIVES To compare the efficacies of medium-dose fluticasone propionate (FP), medium-dose triamcinolone acetonide (TAA), and combined low-dose FP plus salmeterol (SL). DESIGN Randomized, double-blind, triple-dummy, multicenter, 12-week clinical trial. SETTING Allergy/respiratory care clinics. PATIENTS Six hundred eighty patients with asthma previously uncontrolled with low-dose inhaled...

The process of bid/no-bid decision-making is su bjected to uncertainty and influence of complex criteria. This paper proposed an application of the integration of rough sets (RS) and improved general regression neural network (GRNN) based on niche particle swarm optimization (NPSO) algorithm for tendering decision making. The decision table of RS and the attribution reduction was processed by M...

STUDY OBJECTIVES To investigate the potential for mometasone furoate (MF) to exert systemic effects following administration by dry powder inhaler (DPI) or metered-dose inhaler (MDI). DESIGN Three randomized, evaluator-blind, placebo-controlled, parallel-group, 28-day studies. PATIENTS Adults with mild-to-moderate persistent asthma. INTERVENTIONS Study 1 (12 patients per treatment group; ...

in recent years, impinging streams have received increasing interest for their high efficiency in heat and mass transfer. this numerical study was conducted to investigate flow and heat transfer characteristics of one-way opposing jets of non-newtonian fluids. effects of reynolds number impinging angle, momentum ratio and flow behavior index on mixing index were evaluated. the results showed im...

We analyze a dynamic informationally restricted auction mechanism a rental car company created to sell its cars. All bids are submitted via the internet in continuous time in ascending price auctions that last for two minutes. Unlike English or Japanese auctions, bidders do not observe the number of other bidders in the auction or their bids. At any time in the auction each bidder only knows a)...

Body image disturbance (BID) refers to persistent dissatisfaction, distress, and dysfunction related to some aspect(s) of one's physical appearance. Cognitive models of BID highlight the importance of dysfunctional beliefs in maintaining BID. Relational Frame Theory (RFT), in contrast, posits that psychological distress is sustained by the unwillingness to experience aversive internal experienc...

The purpose of this study is to compare the impacts of momentum on stock returns of companies listed in Tehran Stock Exchange in different market conditions. For this purpose, the sample size is 120 months from 2008 to 2017. The research hypotheses are estimated using multivariate linear regression using time series method. Based on the results of the hypotheses test, the momentum in each of th...