A Single Server Retrial Queue with Impatient Customers

In the present paper, a single server retrial queue with impatient customers is studied. The primary arrivals and repeating calls follow the Poisson distribution. The service time is exponentially distributed. Explicit time-dependent probabilities of an exact number of arrivals and departures from the orbit are obtained by solving the differential-difference equations recursively. Steady state solution of the number of busy servers is obtained. The numerical results are graphically displayed to illustrate the effect of arrival rate, retrial rate and service rate on different probabilities against time. Some special cases of interest are also deduced

Humoral and cytokine response elicited during immunisation with recombinant Immune Mapped protein-1 (EtIMP-1) and oocysts of Eimeria tenella

Eimeria tenella, the causative agent of caecal coccidiosis, is a pathogenic gut dwelling protozoan which can cause severe morbidity and mortality in farmed chickens. Immune mapped protein-1 (IMP-1) has been identified as an anticoccidial vaccine candidate; in the present study allelic polymorphism was assessed across the IMP-1 coding sequence in E. tenella isolates from four countries and compared with the UK reference Houghton strain. Nucleotide diversity was low, limited to expansion/contraction of a CAG triplet repeat and five substitutions, three of which were non-synonymous. The EtIMP-1 coding sequence from a cloned Indian E. tenella isolate was expressed in E. coli and purified as a His-tagged thioredoxin fusion protein. An in-vivo vaccination and challenge trial was conducted to test the vaccine potential of recombinant EtIMP-1 (rEtIMP-1) and to compare post-vaccination immune responses of chickens to those stimulated by live oocyst infection. Following challenge, parasite replication measured using quantitative PCR was significantly reduced in chickens that had been vaccinated with rEtIMP-1 (rIC group; 67% reduction compared to UC or unimmunised controls; 79% reduction compared to rTC group or recombinant thioredoxin mock-immunised controls, p < 0.05), or the birds vaccinated by infection with oocysts (OC group, 90% compared to unimmunised controls). Chickens vaccinated with oocysts (OC) had significantly higher levels of interferon gamma in their serum post-challenge, compared to rEtIMP-1 vaccinated birds (rIC). Conversely rEtIMP-1 (rIC) vaccinated birds had significantly higher antigen specific serum IgY responses, correlating with higher serum IL-4 (both p < 0.05)

Study of Modeling Approach for Fluid Catalytic Cracking Riser Reactor Using Pseudo Component Reaction Kinetics

Fluid catalytic cracking modeling and simulation are based upon different kinetic modeling .The kinetic models are classified on the basis of chemical entities. The entities are ?lumps? based on boiling point , chemical type and structured oriented lumping . Boiling point based lump models are easy to simulate because they have less complexity and required least amount of data, where as chemical type and structured based modeling require detail analysis of feed and data to calibrate the kinetic parameters. Pseducomponents based modeling approach for the kinetic parameter estimation, eliminates the need for determining a large number of rate constant required in conventional lumped models. Kinetic model play a important role in effective simulation of fluid catalytic cracking Most of the experimental works are limited to micro activity test (MAT) reactor. Due to poorly defined reaction mechanism, scale up from laboratory result to industrial scale is not possible. Major drawback lies in the single-event reaction mechanism being used for modeling/analysis of FCC kinetics. By using a new concept of pseudo-kinetic reaction mechanism better predictability of yield can be obtained if proper hydrodynamic model is used

VAGINAL VERSUS ABDOMINAL HYSTERECTOMY FOR BENIGN CONDITIONS

ABSTRACT Hysterectomy is the commonest gynaecological surgery performed in women. Present study involved 43 patients undergoing hysterectomy for benign condition. Out of 43 patients vaginal hysterectomy were performed in 26 cases and rest of the cases were performed by abdominal route. Out of 26 vaginal hysterectomy a case was converted into abdominal hysterectomy because of preoperative urinary bladder injury. Keeping all complications in mind we suggest that selective women requiring a hysterectomy for menstrual disorders from fibroid uterus or DUB may be offered a choice for vaginal hysterectomy. Key Words: Hysterectomy, uterine leiomyoma

Parallel Page Rank Algorithms: A Survey

The PageRank method is an important and basic component in effective web search to compute the rank score of each page. The exponential growth of the Internet makes a crucial challenges for search engines to provide up-to-date and relevant user?s query search results within time period. The PageRank method computed on huge number of web pages and this is computation intensive task. In this paper, we provide the basic concept of PageRank method and discuss some Parallel PageRank methods. We also compare some Parallel algorithmic concepts like load balance, distributed vs. shared memory and data layout on these algorithms

Enucleation of the solitary epithelial cyst of pancreatic head in an adult: A case report and review of the literature

Solitary true pancreatic cyst is a rare entity, and only a few cases are reported in the literature. We report a case of a 35&#8209;year&#8209;old woman who had a cyst in the head of the pancreas and gall stones and presented with complaints of pain in the epigastric region. The patient underwent open cholecystectomy with aspiration of the pancreatic cyst at some other private hospital. After 4 months, she presented to us with no relief in pain. Repeat contrast&#8209;enhanced computed tomography of the abdomen showed recurrence of the cyst. The patient underwent enucleation of the cyst at our hospital. During a 2&#8209;year follow&#8209;up after the enucleation, she remained asymptomatic

CONTROL OF MULTIPLE MOBILE AGENTS VIA ARTIFICIAL POTENTIAL FUNCTIONS AND RANDOM MOTION

ABSTRACT This paper investigates the effectiveness of designed random behavior in cooperative formation control of multiple mobile agents. A method based on artificial potential functions provides a framework for decentralized control of their formation. However, it implies heavy communication costs. The communication requirement can be replaced by onboard sensors. The onboard sensors have limited range and provide only local information, and may result in the formation of isolated clusters. This paper proposes to introduce a component representing random motion in the artificial potential function formulation of the formation control problem. The introduction of the random behavior component results in a better chance of global cluster formation. The paper uses an agent model that includes both position and orientation, and formulates the dynamic equations to incorporate that model in artificial potential function approach. The effectiveness of the proposed method is verified via extensive simulations performed on a group of mobile agents and leaders. INTRODUCTION Formation control of multiple autonomous vehicles has received attention of several researchers working in the area of mobile robotics because of its potential applications in a number of fields including cooperated search and rescue operation, surveillance, reconnaissance, and boundary protection. Advancement in communication and sensing technologies, and in computing resources have made it possible to coordinate the movement of several autonomous vehicle