Irreducible Hamiltonian BRST symmetry for reducible first-class systems

An irreducible Hamiltonian BRST quantization method for reducible first-class systems is proposed. The general theory is illustrated on a two-stage reducible model, the link with the standard reducible BRST treatment being also emphasized.Comment: Latex 2.09, 23 pages, to appear in Int. J. Mod. Phys.

Irreducible Hamiltonian approach to the Freedman-Townsend model

The irreducible BRST symmetry for the Freedman-Townsend model is derived. The comparison with the standard reducible approach is also addressed.Comment: 18 pages, LaTeX 2.0

Development and Performance Evaluation of a Rubber and Canvas Strip Fingers Defeathering Machine

Human labour requirement in poultry products processing has continued to increase and more demanding, especially defeathering which is faced with faced challenges such as lacerations and hygiene in handling. To solve these challenges, mechanical defeathering proffered a solution, which further posed a problem of equipment cost and efficiency of operation. This paper investigated a developed a low-cost axial-loading (horizontal) defeathering with dual fingers for small and medium-scale poultry processors. This study reported the development of a defeathering machine which comprises of an axial defeathering drum with strip fingers, which flaps on the carcass to pluck off feathers in motion. The machine is electrically powered with a defeathering power requirement of 0.304 kW and at a power rating of 0.269 kW. The performance evaluation carried out with a broiler, cockerel and layer birds at a soaking temperature of 80 degree Celsius for an average time of 1 minutes showed that the efficiency and the effectiveness of the machine varies with respect to the quality of cleaned carcass produced. It was also observed that it takes the machine about 60 seconds to completely defeather a broiler of 2.4 kg weight, 70 seconds to defeather an old layer breed of bird of about 1.2 kg weight and 105 seconds to defeather a 1.3 kg weight of local chicken. However, test carried out on local birds showed that the machine was less effective defeathering local chicken at low temperature, because of the toughness of the skin. Comparatively, canvass (leather) fingers have the highest defeathering efficiency while rubber strip fingers produced the least defeathering efficiency. Therefore, canvas (leather) strip finger performed better than rubber strip fingers

Analisis Customer Relationship Management terhadap Kepuasan Pasien Pusat Jantung Nasional Harapan Kita

The research tries to find out how big the influence of Customer Relationship Management of Heart Centre Patient Harapan Kita concerning the patient satisfaction. The Customer Relationship Management divide into three main functions which is Acquisition, Enhance, and Retain. The conclusion is, if there is increased in Customer Relationship Management of Heart Centre Patient Harapan Kita, it will increased the patient satisfaction also

Irreducible antifield-BRST approach to reducible gauge theories

An irreducible antifield BRST quantization method for reducible gauge theories is proposed. The general formalism is illustrated in the case of the Freedman-Townsend model.Comment: 19 pages, LaTeX 2.0

Identification of Radar Signals Based on Time-Frequency Agility using Short-Time Fourier Transform

With modern advances in radar technologies and increased complexity in aerial battle, there is need for knowledge acquisition on the abilities and operating characteristics of intercepted hostile systems. The required knowledge obtained through advanced signal processing is necessary for either real time-warning or in order to determine Electronic Order of Battle (EOB) of these systems. An algorithm was therefore developed in this paper based on a joint Time-Frequency Distribution (TFD) in order to identify the time-frequency agility of radar signals based on its changing pulse characteristics. The joint TFD used in this paper was the square magnitude of the Short-Time Fourier Transform (STFT), where power and frequency obtained at instants of time from its Time-Frequency Representation (TFR) was used to estimate the time and frequency parameters of the radar signals respectively. Identification was thereafter done through classification of the signals using a rule-based classifier formed from the estimated time and frequency parameters. The signals considered in this paper were the simple pulsed, pulse repetition interval modulated, frequency hopping and the agile pulsed radar signals, which represent cases of various forms of agility associated with modern radar technologies. Classification accuracy was verified using the Monte Carlo simulation performed at various ranges of Signal-to-Noise Ratios (SNRs) in the presence of noise modelled by the Additive White Gaussian Noise (AWGN). Results obtained showed identification accuracy of 99% irrespective of the signal at a minimum SNR of 0dB where signal and noise power were the same. The obtained minimum SNR at this classification accuracy showed that the developed algorithm can be deployed practically in the electronic warfare field for accurate agility classification of airborne radar signals

Synthesis, characterization and antimicrobial activity of mixed transition metal complexes of salicylic acid with 1, 10-phenanthroline

A new series of Mn(II), Fe(II), Co(II), Cu(II) and Zn(II) mixed ligands-metal complexes derived from salicylic acid (SA) and 1,10-phenanthroline (PHEN) have been synthesized and characterized by spectroscopic studies. The coordination of the two ligands towards central metal ions has been proposed in the light of elemental analysis, IR, UV–vis spectroscopic studies. The results of the physical and spectroscopic data confirmed that the ligands are chelating agents. In 1, 10-phenanthroline, coordination occurred through the two pyridinic nitrogen groups, while in the salicylic acid coordination occurred through the oxygen of the hydroxyl and the carboxylic groups. All the complexes synthesized were of octahedral geometry. Antimicrobial activity of the mixed ligands metal complexes and the free ligands were carried out against the bacterial Escherichia coli, staphylococcus aureus, klebsiella pneumonia, pseudomonas aeruginosa and the fungi candida spp. The mixed ligands metal complexes showed higher activities when compared to the free ligands of salicylic acid but were less active than the free 1,10-phenanthroline ligand. The complexes of Cu (II) showed the highest antimicrobial activity while the Fe(II ) complex showed the least activity against the bacterial and fungi organisms.Keywords: 1,10-phenanthroline, Salicylic acid, Mixed ligands-metal complexes, Transition metal, Spectroscopy, Antimicrobia

On the Irreducible BRST Quantization of Spin-5/2 Gauge Fields

Spin-5/2 gauge fields are quantized in an irreducible way within both the BRST and BRST-anti-BRST manners. To this end, we transform the reducible generating set into an irreducible one, such that the physical observables corresponding to these two formulations coincide. The gauge-fixing procedure emphasizes on the one hand the differences among our procedure and the results obtained in the literature, and on the other hand the equivalence between our BRST and BRST-anti-BRST approaches.Comment: 12 pages, latex 2.09, no figure

Irreducible Hamiltonian BRST analysis of Stueckelberg coupled p-form gauge theories

The irreducible Hamiltonian BRST symmetry for p-form gauge theories with Stueckelberg coupling is derived. The cornerstone of our approach is represented by the construction of an irreducible theory that is equivalent from the point of view of the BRST formalism with the original system. The equivalence makes permissible the substitution of the BRST quantization of the reducible model by that of the irreducible theory. Our procedure maintains the Lorentz covariance of the irreducible path integral.Comment: 29 pages, LaTeX 2.0